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SEA - LHR

£200 Find cheap flights from Seattle to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Heathrow departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 25/5
Sat 1/6

Search hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
In the last 7 days, travellers have searched 44,979,812 times on KAYAK, and here's why:

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals from Seattle to Heathrow (SEA-LHR)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
18:55 - 20:20SEA-LHR
17h 25m1 stop
21:25 - 17:55LHR-SEA
28h 30m1 stop
£463Icelandair
Find Deal
Tue, 24 Sep - Mon, 7 Oct
18:55 - 20:20SEA-LHR
17h 25m1 stop
21:25 - 17:55LHR-SEA
28h 30m1 stop
£467Icelandair
Find Deal
Tue, 24 Sep - Mon, 7 Oct
19:40 - 13:00SEA-LHR
9h 20mdirect
09:50 - 11:35LHR-SEA
9h 45mdirect
£557British Airways
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Wed, 18 Sep - Wed, 25 Sep
16:30 - 09:50SEA-LHR
9h 20mdirect
20:25 - 11:15LHR-SEA
21h 50m1 stop
£561Virgin Atlantic
Find Deal
Sun, 20 Oct - Sun, 27 Oct
13:30 - 06:50SEA-LHR
9h 20mdirect
09:25 - 12:25LHR-SEA
10h 00mdirect
£564Finnair
Find Deal
Fri, 18 Oct - Tue, 29 Oct
11:15 - 10:15SEA-LHR
15h 00m1 stop
12:45 - 14:40LHR-SEA
9h 55mdirect
£567Virgin Atlantic
Find Deal
Wed, 25 Sep - Sat, 5 Oct
09:56 - 08:00SEA-LHR
14h 04m1 stop
10:30 - 18:52LHR-SEA
16h 22m1 stop
£575Finnair
Find Deal
Fri, 4 Oct - Thu, 17 Oct
18:15 - 16:35SEA-LHR
14h 20m1 stop
16:50 - 19:15LHR-SEA
10h 25mdirect
£593Air France
Find Deal
Sun, 11 Aug - Tue, 27 Aug
09:56 - 08:00SEA-LHR
14h 04m1 stop
09:45 - 11:30LHR-SEA
9h 45mdirect
£594British Airways
Find Deal
Wed, 14 Aug - Thu, 29 Aug
21:15 - 14:50SEA-LHR
9h 35mdirect
10:50 - 19:23LHR-SEA
16h 33m1 stop
£612Air France
Find Deal
Fri, 20 Sep - Mon, 30 Sep

Flights from Seattle to Heathrow - Travel Insights & Trends

Get data-powered insights and trends into flights from Seattle to Heathrow to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to London Heathrow Airport?

The average price of all flights from Seattle to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.
When flying from Seattle to London Heathrow Airport, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Seattle, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

What is the cheapest month to fly from Seattle to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Seattle to London Heathrow Airport is February, where tickets cost £557 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is £941 and £917 respectively.

How far in advance should I book a flight from Seattle to London Heathrow Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to London Heathrow Airport, you should book around 2 days before departure. For the absolute cheapest price, our data suggests you should book 62 days before departure.

Which airlines provide the cheapest flights from Seattle to London Heathrow Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to London Heathrow Airport from Seattle were found on Icelandair (£200) and KLM (£380), and the lowest return tickets were found on Icelandair (£463) and Air Canada (£511).

Which airlines fly most frequently between Seattle and London Heathrow Airport?

British Airways connects Seattle to London Heathrow Airport with up to 5 flights per day. Delta also offers 1 flight per day, while Virgin Atlantic follows with 1 flight per day.

Which airlines fly direct between Seattle and London Heathrow Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Seattle to London Heathrow Airport.
There are 3 airlines that fly direct from Seattle to London Heathrow Airport. They are: British Airways, Delta and Virgin Atlantic. The cheapest price of all airlines flying this route was found with Virgin Atlantic at £512 for a one-way flight. On average, the best prices for this route can be found at British Airways.

How many flights are there between Seattle and London Heathrow Airport per day?

Each day, there are between 7 and 9 nonstop flights that take off from Seattle and land in London Heathrow Airport, with an average flight time of 9h 24m. The most common departure time is 19:00 and most flights take off in the evening. Each week, there are 57 flights. The most frequent day of departure is Friday, when 16% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Seattle and London Heathrow Airport?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Seattle to London Heathrow Airport take?

A direct flight to London Heathrow Airport will take on average 9h 20m to travel the 4,783 miles flying distance from Seattle.

What’s the earliest departure time from Seattle to London Heathrow Airport?

Early birds can take the earliest flight from Seattle at 13:30 and will be landing in London Heathrow Airport at 06:50.

What’s the latest departure time from Seattle to London Heathrow Airport?

If you prefer to fly at night, the latest flight from Seattle to London Heathrow Airport jets off at 21:10 and lands at 14:50.

Good to know - Cheap tickets from Seattle to London Heathrow Airport

Low season

January

High season

June

Cheapest flight

£200
Best time to beat the crowds (21% less expensive on average)
Most popular time to fly (30% more expensive on average)
Flight from Seattle to London Heathrow Airport

When to book flights from Seattle to Heathrow

Are your dates flexible? Find out the best times to travel from Seattle to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Seattle to London Heathrow Airport flights

  • Where can passengers spend the night at Seattle Tacoma international airport?

    If you are having an early morning flight at Seattle Tacoma international airport and want to spend the night at the airport, there are armrest seats and benches. You can also bring a sleeping bag and heavy clothes to lay on one of the floors with carpets. Passengers can use the meditation room, which provides a peaceful and quiet place. We recommend passengers carry noise-canceling headphones and earplugs to avoid loud noises from the busy airport. Passengers willing to spend extra money can spend the night at the nearby hotels. Nearby hotels offering free shuttle services to and from the airport include Crowne Plaza Seattle Airport, Radisson Hotel Seattle Airport and La Quinta Inn & Suites Seattle SeaTac airport.

  • Does Seattle Tacoma international airport offer parking services?

    Passengers who want to leave their vehicle at the airport can reserve a parking lot by booking online before to avoid inconveniences. Seattle Tacoma international airport offers long-term and short-term parking services. The long-term parking is located on the fourth floor of the parking garage. There are also self-service kiosks outside gates B, C, D, N and S, where passengers can download their favorite movies for their trip.

  • Which services are available at Seattle Tacoma international airport?

    If you arrive early at Seattle Tacoma international airport, enjoy the services offered at the airport. Loosen your stiff muscles at the massage bars near gate A5 on the airside of level 5. Passengers who want to freshen up can take advantage of Delta airlines sky club.

  • Where can passengers spend time on arrival at London Heathrow airport?

    Traveling can sometimes be cumbersome, and passengers may want to relax or take a nap after arrival. Aerotol London Heathrow airport, located inside LHR airport, offers guest rooms. Passengers can relax and finish work upon arrival at the airport. Plaza Premium Lounge & No. 1 Heathrow is a hotel inside the airport with private napping rooms where passengers can relax. There are also nearby hotels where passengers can relax and have their meals.

  • What is the cheapest flight from Seattle to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Seattle to London Heathrow Airport was £249 for a one-way ticket and £576 for a return.

  • Which airports will I be using when flying from Seattle to London Heathrow Airport?

    Seattle airport is called Seattle/Tacoma Intl and the only airport in London Heathrow Airport is London Heathrow.

  • Which airlines offer Wi-Fi service onboard planes from Seattle to London Heathrow Airport?

    All the following airlines offer inflight Wi-Fi service on the Seattle to London Heathrow Airport flight route: American Airlines, Delta, Air France, KLM, Lufthansa, Virgin Atlantic, United Airlines, and Finnair.

  • Which aircraft models fly most regularly from Seattle to London Heathrow Airport?

    The Boeing 787-9 Dreamliner is the aircraft model that flies most regularly on the Seattle to London Heathrow Airport flight route.

  • Which airline alliances offer flights from Seattle to London Heathrow Airport?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and London Heathrow Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Seattle to London Heathrow Airport?

    There are direct flights from Seattle to London Heathrow Airport on a daily basis.

  • Which is the best airline for flights from Seattle to London, Virgin Atlantic or Finnair?

    The two airlines most popular with KAYAK users for flights from Seattle to London are Virgin Atlantic and Finnair. With an average price for the route of £725 and an overall rating of 7.7, Virgin Atlantic is the most popular choice. Finnair is also a great choice for the route, with an average price of £712 and an overall rating of 7.7.

  • How does KAYAK find such low prices on flights from Seattle to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Seattle is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Seattle with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Seattle to London Heathrow Airport

  • Looking for a cheap flight from London Heathrow Airport to Seattle? 25% of our users found flights on this route for £407 or less one-way and £675 or less round-trip.
  • If you need any assistance at Seattle Tacoma International Airport (SEA), there are airport volunteers in blue jackets who provide help to stranded passengers. Customer representatives are in red vests with iPads, directing passengers where they wish to go.
  • If you want a quiet place to pray and meditate at London Heathrow Airport (LHR), there are multi-faith prayer rooms. They are located in terminals 2, 3, 4 and 5.
  • Passengers traveling on this route have many options to consider. You can fly directly from Seattle Tacoma international airport to London Heathrow airport using Aer Lingus, Singapore Airlines, Virgin Atlantic, American Airlines, AeroMexico, Delta, KLM, Iberia, Finnair and British Airways. There are also flights with stopovers which are cheaper compared to direct flights.
  • For passengers who want to avoid the stress of carrying heavy bags at London Heathrow airport, there is a company known as Excess Baggage Company providing storage facilities. They are found at terminals 2, 3, 4 and 5.
  • We recommend passengers carry their water bottles since Seattle Tacoma international airport has free water filling stations. The stations are located at gates A20, A5, C2, D1, and S gates and the central terminal.
See more tips

Prefer to fly direct from Seattle to London Heathrow Airport?

Find which airlines fly direct from Seattle/Tacoma Intl to Heathrow, which days they fly and book direct flights.

Direct departures

Seattle/Tacoma Intl to London Heathrow

Monday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Tuesday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Wednesday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Thursday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Friday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Saturday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Sunday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

See more direct flights

Direct returns

London Heathrow to Seattle/Tacoma Intl

Monday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Tuesday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Wednesday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Thursday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Friday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Saturday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

Sunday

Aer Lingus, Aeromexico, Air France, +8 more

Aer Lingus, Aeromexico, +9 more

See more direct flights
See more direct flights

Top 5 airlines serving from Seattle to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Seattle to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.7
FinnairOverall score based on 1383 reviews
7.5comfort
7.0entertainment
7.8boarding
8.2crew
6.9food
Airline reviews

Great flight- smooth, nice crew, nice clean aircraft, departed a little late but arrived 10 early.

10.0 ExcellentAnonymous, Apr 2024LHR - SFO
Read more about Finnair reviews

Great flight- smooth, nice crew, nice clean aircraft, departed a little late but arrived 10 early.

It was listed on my ticket as Finnair but there was no indication that the flight was Finnair. In fact the number was even different. There were no employees there until exactly 2 hours before so we had to wait in line at Iberia and hope

Sorting on line would have been appreciated Onward information on flights missed No ability to get seating arranged before we got to gate Very unfriendly at gate

The flight was Finnair but there was no indications anywhere that the checkin was for Finnair also. There was no one to ask. I think at a minimum they should list the code shares so people don’t stand in the wrong line for an hour.

I booked the flight with Finnair, which made the arrangements for downloading a boarding pass unnecessarily complicated. I wouldn't do that again. Instead I'd book direct with AA.

Had a nice flight to London on BA will fly with them again in the future

Finnair cancelled my flight 12 hours prior to leaving for Helsinki. They stated there were mechanical problems. I had to scurry around to find a new flight that would meet my needs for arrival in Helsinki. Luckily I was able to find alternate transportation through Lufthansa/United.

Helpful steward. Allowed me to move to some empty seats and I was able to get some sleep. He also had milk for my tea. Americans don’t realise that cream or half and half ruin tea.

Security was a mess at the Helsinki Airport. But I was delighted by the connecting flight waiting for us for JFK.

Very rude hostess. She embarrassed me in front of others. I went to sit after taking off in a different sit in the same economic cabin. Was the area where doors are. She come to me very laud and said: go back to your sit those sit are more expensive.wow! No diplomacy. Flight was super full except 3 of those sit. The only person in that row later during the flight occupied all sit laying down!. Once more disappointed at American Airlines. Early flight they lost my luggages for 4 days. Never refund money for replacement for some of essential items purchased..when I booked the flight I thought was Finlandair. I

Cabin crew on our flight showed lack of any customer service gruff and acting annoyed if you asked anything and I mean anything Example a man on the seat over dropped his beer on my husbands blanket We asked if we could switch out blankets cabin crew Said. No we don’t have any extras OK well can you take the wet one Cabin crew looked disgusted and annoyed Took it no OK or yes just a growl

Quick flight. But cabin crew were very noisy and talking too much, especially when we were seated at the back of the plane trying to sleep through the night .

My ticket was for Premium Economy and all the seats were taken, I was placed in Economy class and I’m looking for a refund.

The delay was an issue. Other than that. Every thing good

Staff didn’t check cabin well for landing seemed more interested in chatting to each other. Food was poor and differed from pre order.

We were in the last group to be called to the flight - which was 30 minutes late taking off. While we were lucky enough to have been given bulkhead seats (due to a medical condition I’d told them about beforehand) the seats weren’t particularly comfortable. A crying baby for the whole trip made things worse, so the crew managed very well with coping. The final thing I’d say was that there wasn’t enough food served during the flight.

Very good. Glad we had Premium for the flight out.

We flew Upper Class from London to The Turks and Caicos. Check in was amazing. Our ldriver too us directly to a special entrance to terminal 3. It took 10 minutes to check in and clear customs. Amazing! The VA lounge is large and comfortable. Boarding the flight was easy and without a wait. The crew was excellent. But the seats were awful, strange and uncomfortable. Having a comfortable flat bed seat is the reason we pays 1000s extra. The VA 787 uses a reverse herringbone configuration. Look it up. You have your back to the window and are facing the aisle with no privacy. Turning the seat into a bed requires assistance from the crew so not very spontaneous. . The food was ok. A bit tasteless and meager portions. Had to pay for WiFi. I believe VA has other configuration on their dream airbus flights. Lots of stuff about all this on YouTube where you can see what I have been describing. I can not recommend taking VA on a long flight with these seats.

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff were fantastic friendly nice they came round and check we need anything else to eat or drink

From the start everything was perfectly fine. First meal was fantastic. Breakfast needs a lot of work and food was overcooked and not very nice for breakfast. Staff for a fantastic friendly nice we came round and check we need anything else to eat or drink

Did not find the wheelchair that supposed to assist and went to a long queue for transit security chk which was very slow and boarding desk wanted to close counter although that they knew that I am minutes away because of their mistake of not providing the wheelchair.

Business class in the second leg - CDG-EVN was a disaster.

Everything went smoothly with Air France. There was a delay in departure which seemed to relate to the immigration services being short staffed.

worst experience ever i choose my seat in advance and also have my seat selected in my boarding and the they told me that my seat has been changed without notify me

Food could have been better especially the breakfast. Overall it was a good flight

I have used Air France and KLM many times it will help if they change their menu's feel like it's been the same for years!!!, Especially the breakfast. Overall the flight was good and enjoyable.

No birding was given for next trip on same carrier, food was very moderate.

We transited through Chad and what was supposed to be a 1hr 20 minutes transit time lasted over 4hrs. We didn't get regular updates until we complained. After a 10hr flight from Paris no form of refreshment given and finally arrived Abuja over 6hrs later and none of my bags came

The line at boarding was not well organized and managed

A couple of minor delays in boarding but very professional and efficient staff.

I will never fly this airline again. Checking in was poor , we had to go back to the check in counter at Raleigh - Durham international airport three times because they didn’t issue my boarding pass but rather duplicated my husband’s twice which caused a big headache at the passport control at the airport which triggered security alert and wouldn’t let us pass through we we had to wait for long time to be able to explain and clear everything after talking to the supervisor.. No food on the plane , not even crackers. No food was offered to buy ether . No ear phone was provided . Very little time to make from one plane to another and nobody to assist with smooth transition. Flight itself , we felt safe so thank you to the pilots . But customer service was terrible . We spent $ 2500 on 2 tickets, so I cannot say that service was consistent with the price .

Seats are way too much now with these new airplanes especially long flights like we had. I was 7 month pregnant and in a lot of discomfort due to small seats.

Food was horrible. This wasn’t business class. No leg space, can’t sleep in row position, huge delay

I liked how easy my transfers between flights in Keflavik were. I would have appreciated more food options in Keflavik.

The plane was flaming hot! Could not breathe. Everyone coughing from heat. Awful.

My biggest problem was the flight from KEF to DUB was delayed, which caused me to miss my connecting flight in DUB and we were forced into an unplanned 10-hour layover in DUB. Crew and boarding staff were all very friendly but this was a real inconvenience and especially uncomfortable for my disabled wife.

Not much! This was my first flight with Iceland air and unfortunately it wasn’t what I have expected. My luggage is lost nothing as of yet where it was left. Not a good service at all!!

The seat size was more like a domestic than an international flight. In fact, i would compare the ammenities, quality and service to a short hall ryan air flight, which was unexpected for an international flight. The plane was extremely hot so sleeping was difficult. My biggest complaint was that they are very strict on carry on luggage only allowing it to weigh 10kg/22lb. I try to limit myself to a carryon so i don't have to mess with bagage claim, but the wieght restriction made it impossible. I have never had a carry on weight restriction (at least enforced) on an international flight. Will not be including them in future searches.

Pros: "I liked the northern lights look after boarding upon introduction of the captain and crew members. Everyone was super personal and uninformed looked great. The best part was when they started boarding from the last row, which is the most logical and efficient way to do it"
Pros: "Got assisted to the plane by airport staff as I was in a wheelchair"
Cons: "Food on board was awful. Ordered hamburger but not availabe having already pre paid. Pizza was poor quality and had no taste. Range of food disappointing"

In economy and food was ok, but with limited leg space (and I was in a 2 seat configuration) it was difficult to eat with a tiny seat tray. I spilt wine on my trousers. First time on British Air (I usually fly Turkish Air) and in a 777. Heathrow was pleasant but changing terminals awkward.

Starting with the flight Cairo to London the plain was so poor no entertainment at all uncomfortable seats although it’s 5 hours long,then an American airline plain took me from London to Miami it was a bad experience the crew most of flight time not available and they asked us to help our selves for any snacks if we need. From Miami to London actually was perfect flight with a huge plain and perfect crew but from London to Cairo was horrible plain with stiff fixed seats not movable no entertainment or wi fi very poor Menu which is unacceptable for a business class

I've done hundreds of flights in my life, and this flight was one of the best I've ever taken, From beginning to end, everything went smoothly, professionally, and with a smile and friendly attitude from all employees I interacted with. The food was delicious (and free), as were the drinks. There was just a genial and effective way in the way that British Airways organized the flight -that reminded of days in the 70's, 80's, and 90's, when flying was a fun, and exciting adventure. I enjoyed and had confidence in the abilities of the flight crew, I'll be flying British Airways several more times this summer. Thank you so much for the great experience! Cheryl Olso

Terrible! I missed my flight to my final destination and British airlines and American Airlines keep pointing fingers on each other’s. Nobody wants to take responsibility

Overall, terrific service, accommodations, and experience. Only reason comfort was rated lower was because it was difficult to keep a comfortable sleeping position for the overnight flight, but I also had an economy seat.

Very cramped seats in economy, difficult to get comfortable with your legs and feet and back. The seat width is ok but I’m average size. Food is HORRIBLE. Crew is friendly. Delays and very tight connections made it tough for navigating. We would have missed our connecting flight if it wasn’t delayed too. The terminal transit was slow and normally every 10 minutes before 8pm, after 8 pm is every 30 minutes!!!!! No free wine or drinks!! Below average attitude.

Leg room was better than expected. Lavatory’s were easy to access.crew was grea!

Horrible seat allocation. Boarding was slow. Food was average and so was entertainment. The TV terminal didn't work and so had to use remote.

Lost one checked bag.and wasted 30min waiting and filing missing baggage report. Very unsatisfied.

This was an American Airlines flight. The crew were very unhappy and quite grumpy. Abrupt to the point of being rude. The food was dreadful. Indeed the breakfast was in edible. I will avoid AA at all costs in the future.

Book cheap flights from Seattle to London

Cheapest flights to London from Seattle found in 2024

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to London found on KAYAK in the last 72 hours.
8/10Tue
1 stopIcelandair
20h 30mSEA-LHR
£200
30/9Mon
1 stopIcelandair
12h 05mSEA-LHR
£201
23/7Tue
2 stops
21h 55mSEA-LHR
£270
27/5Mon
2 stops
31h 40mSEA-LHR
£271
25/9Wed
directKLM
9h 35mSEA-LHR
£380
22/9Sun
1 stopDelta
22h 45mSEA-LHR
£383
29/7Mon
directKLM
9h 35mSEA-LHR
£500
22/7Mon
1 stopDelta
22h 35mSEA-LHR
£504
1/5Wed
directBritish Airways
9h 20mSEA-LHR
£517
1/5Wed
1 stopBritish Airways
12h 48mSEA-LHR
£520

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Last minute flights from Seattle to Heathrow

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Seattle to London that are departing in the next 10 days.
26/4Fri
multi-stopLufthansa
16h 10mSEA-LHR
28/4Sun
multi-stopLufthansa
16h 57mLHR-SEA
£525
26/4Fri
multi-stopSWISS
20h 45mSEA-LHR
28/4Sun
multi-stopSWISS
24h 45mLHR-SEA
£538
28/4Sun
directVirgin Atlantic
9h 20mSEA-LHR
14/5Tue
directVirgin Atlantic
9h 55mLHR-SEA
£641
30/4Tue
directVirgin Atlantic
9h 20mSEA-LHR
8/5Wed
directVirgin Atlantic
9h 55mLHR-SEA
£646
27/4Sat
multi-stopBritish Airways
12h 48mSEA-LHR
4/5Sat
multi-stopBritish Airways
15h 02mLHR-SEA
£741
28/4Sun
multi-stopBritish Airways
12h 10mSEA-LHR
4/5Sat
multi-stopBritish Airways
27h 01mLHR-SEA
£879
30/4Tue
multi-stopIcelandair
12h 05mSEA-LHR
3/5Fri
multi-stopIcelandair
12h 35mLHR-SEA
£1,105
30/4Tue
multi-stopFinnair
15h 03mSEA-LHR
5/5Sun
multi-stopFinnair
15h 15mLHR-SEA
£1,118
29/4Mon
multi-stopIcelandair
16h 57mSEA-LHR
3/5Fri
multi-stopIcelandair
15h 51mLHR-SEA
£1,195
29/4Mon
multi-stopFinnair
23h 01mSEA-LHR
8/5Wed
directFinnair
9h 45mLHR-SEA
£1,312

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Seattle - London Heathrow Airport Flights

Departure:

Seattle (SEA)United States

Destination:

London Heathrow Airport (LHR)United Kingdom

Return flight deals:

London Heathrow Airport - Seattle

Cabin classes:

£2,434
£1,532
£541