Find Cheap Flights from London Heathrow to Seattle

Return
Economy
London (LHR)
Seattle/Tacoma Intl
Mon 18/11
Mon 25/11
Any month
Compare vs KAYAK |
Search hundreds of travel sites at once for deals on flights to Seattle

London Heathrow to Seattle flight information

Flights arrive in Seattle
Flights depart from London Heathrow
Flight price £299
Distance 4,777 miles
Airlines Lufthansa, Icelandair, KLM, Austrian Airlines

Top tips for finding a cheap flight

Looking for a cheap flight? 25% of our users found flights on this route for £335 or less.

FAQs for Booking London Heathrow to Seattle Flights

How does KAYAK find such low flight prices?
KAYAK processes over 2 billion travel queries annually and displays results from hundreds of airlines and third party sites, allowing it to find a variety of flight prices and options. It also displays results from 2M+ properties along with car hire, holiday packages, activities and millions of verified reviews so users can see as many available travel options as possible.
How can Hacker Fares save me money?
Hacker Fares allow you to combine one-way tickets on different airlines when it can save you money over a traditional return ticket.
Does KAYAK query more flight providers than competitors?
Yes, KAYAK has access to more data and information than online travel agencies and consistently outperforms the competition in accuracy, globally.
How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a given destination and date is likely to change within 7 days, so travellers know whether to wait or book now.

Book cheap flights from London Heathrow to Seattle (return)

Airports
Origin
London
£299
only
£299
Destination
Seattle
£299
only
£299
Wed, 18 Mar
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
15h 13m
Wed, 25 Mar
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
16h 00m
£299
Trip: 8 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 26,960 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.6
MUC
ATH
Excellent 8.0

Pros: Good crew.

Cons: More comfortable seating.

SFO
MUC
Excellent 8.0

Pros: The crew was amazing.

Cons: There seemed to be no leg room. The seat was very uncomfortable.

DEN
MUC
Okay 4.3

Pros: It was on time and got me where I needed to go.

Cons: The crew often bashed my wife's elbow with their trolleys. I am 6'2" and I could not sit with my legs straight in front of me. There is no leg room and the seats do not recline very far. The food was repulsive. They ran out of vegetarian options (my wife is a vegetarian) and what we did eat turned our stomachs.

FRA
PHL
Okay 5.6

Pros: Nothing in particular stands out about our flight. We've flown many airlines, Aeroflot, British Air, Delta, Iceland Air and KLM recently. Lufthansa was right in there with the middlet of the pack, with the exception of Iceland Air, which would be at the bottom, but they make no pretenses. The seats, even in the basic economy, which we had,reclined and were comfortable; good legroom. Food and drink offerings were standard. Amounts were small, but everything was the right temperature. Restrooms were clean and well equipped. Movie offerings, not many newer releases. Nothing like Sky news, so you couldn't check weather or current events. Crew was courteous and attentive,

Cons: Boarding at Frankfort left much to be desired. First off, the equipment was not ready; we waited 45 min. to board after we got to the gate (early) and due to turbulence over the Atlantic, the pilots could not make up the time. We are senior citizens. We, along with about 25 others in our category, responded to the call for us to get in line to board, stand for 30 min. The gate personnel did not provide any information that boarding was NOT imminent at that point, so you had to stand up to keep your place. Finally, once the boarding for people needing assistance began, we got to choose between using 2 flights of stairs (a faster way to get into the plane) or an elevator to board the plane. (Hello! We have trouble with things like stairs; don't you know that?) The elevator accommodated one wheelchair and 2 or 3 people at a time. More waiting in the jetway to get down to the plane! The whole boarding process took 90 min. from the time we stood up to the time they closed the doors. Bad grades for the the cleaning crew making us wait so long, for the gate personnel for keeping us in the dark and the disorganized process boarding. Nobody cared about our discomfort, not what we would have expected from LH. Consequently, we've revised our opinion of Luthansa. Maybe next time we'll take BA.

MUC
JFK
Excellent 9.0

Cons: It was fine, just tiring due to the length of the flight.

Mon, 13 Jan
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
12h 45m
Fri, 17 Jan
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
12h 20m
£305
Trip: 5 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 9,197 reviews
Overall
7.5
Boarding
7.2
Comfort
7.3
Crew
8.1
Entertainment
7.6
Food
6.2
KEF
YUL
Okay 5.6

Cons: The boarding is not made smoothly and it is confusing some times

KEF
JFK
Good 7.6

Pros: The crew is very nice.

Cons: I was cold and I didn’t have a blanket. They should have at least one blanket per seat available. Most of the people had blankets but some didn’t.

BOS
KEF
Okay 4.3

Pros: That we didn't crash

Cons: There should be food, or at least a snack, on a 5.5h flight. Also the seats are extremely small. I barely fit into normal coach seats, but with my 6'7" (200cm) I was extremely uncomfortable in these tiny seats.

YYZ
KEF
Mediocre 3.2

Cons: My flight was delayed, I missed my connection flight and now they lost my luggage. Staff are very friendly, but they can't do much to help me. Icelandair is doing OK in handling the situation, but let's see...I am still in an uncertain situation

BOS
KEF
Excellent 8.0

Cons: Nothing they could have done but screaming baby for hours was.most unpleasant

Thu, 7 Nov
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
12h 58m
Tue, 12 Nov
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
13h 22m
£316
Trip: 6 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 3,422 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.2
Food
7.5
AMS
TXL
Excellent 10.0

Pros: Great airline

NBO
AMS
Good 6.6

Cons: Half the screens were not working - crew were made aware but nothing was done. Vegetarian choices were poor to non-existent ; I witnessed crew insist to a passenger that there were no vegetarian options! They finally cobbled something together for him but not a pleasant experience

AMS
AUH
Excellent 10.0

Pros: Seats were super comfortable, bigger than most planes with extra leg room. Food was excellent and fresh, amazing Dutch cheese sampler was divine. No nonsense staff who had all connecting flight info on hand when we arrived in Abu Dhabi. KLM staff were friendly and efficient. Fabulous airline.

CGK
KUL
Excellent 10.0

Pros: Excellent crew, good food & movie selection.

LIS
AMS
Good 6.4

Pros: The crew tried to be helpful but were equally frustrated with the ground crew.

Cons: Follow your own policies. Allow people to board (economy plus) with their hand luggage who have followed all the rules and chosen a seat in the front of the plane. My daughter and my KLM approved baggage were taken by the boarding crew while allowing other passengers to go with more than allowed

Thu, 24 Oct
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
16h 15m
Tue, 29 Oct
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
17h 55m
£384
Trip: 6 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 4,610 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.4
Entertainment
7.3
Food
7.5
VIE
LHR
Excellent 10.0

Cons: Everything

VIE
IAD
Excellent 10.0

Pros: Food was quite good, and they were great about continually offering beverages throughout the flight.

AMS
ORD
Mediocre 3.6

Cons: Flight entertainment was not fully functional. Many films would not play. The meal was also particularly bad - all three options that were available (chicken, pasta and vegetarian curry). Flight attendants often seemed very rushed.

FRA
VIE
Excellent 10.0

Pros: The crew. The punctuality.

VIE
LHR
Okay 5.2

Pros: In flight crew worked hard

Cons: No lines for boarding - it was a mess And randomly we were asked to check in our bags though Austrian crew had earlier tagged them for carry on

Tue, 25 Feb
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
12h 45m
Fri, 6 Mar
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
12h 20m
£307
Trip: 11 days
7.3GoodShow reviews
Overall 7.3 Good
Based on 9,197 reviews
Overall
7.5
Boarding
7.2
Comfort
7.3
Crew
8.1
Entertainment
7.6
Food
6.2
CDG
KEF
Excellent 9.2

Cons: More choices in the meals for purchase

IAD
KEF
Good 6.0

Pros: flight was fine.

Cons: very disappointed Iceland Air is charging $95 for 1 piece of luggage. This is making me rethink the "deal" because it added $190 to the cost of the flight.

CPH
KEF
Mediocre 3.3

Cons: Aircraft has TV equipment that is not functioning ,no phone chargers in the seats,dirty salon not even a snack!

LHR
KEF
Excellent 10.0

Pros: My flight going to London was a train wreck...missed connecting flight, awful service and charged extra for a backpack that was called ”oddly shaped.” However, the return flight was the exact opposite, amazing service, free check-in because of my experience earlier and upgraded seating. I appreciate that they corrected what had gone wrong. Nicely done!

EWR
KEF
Good 7.2

Cons: Horribly uncomfortable in coach. Leather seats not foot. Clothe would’ve been better. They’d keep you from sliding.

Fri, 6 Dec
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
13h 50m
Mon, 9 Dec
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
31h 00m
£321
Trip: 4 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 26,960 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.6
SFO
FRA
Okay 5.3

Pros: The crew was very helpful, gong out of their way as even bringing me camomile tea. It was lukewarm, it it’s the thought that counts.

Cons: The seats were way too tiny on this giant airbus, even for me and my daughter-in-law who are both under 5 feet and under 100 lbs. te flight was torture. Food also was not as good as previous Lufthansa fare.

BCN
FRA
Good 6.0

Pros: Crew was great. The food Was good.

Cons: Seats were very uncomfortable and there was no air control.

DEN
MUC
Excellent 8.0

Cons: On-time departure and arrival, clean and well-maintained aircraft, good crew, decent meals (2), very tight seating in Economy without much comfort.

SFO
FRA
Excellent 10.0

Pros: Well, maybe except of these "preferred sitting" arrangement. The sit was in front of open space and restrooms. Constantly people were standing and waiting for the restroom. Their butts were literally at the "preferred sited" passengers faces. I felt, I would be way more happy in a regular sit.

Cons: Such sits should not be declared preferred and cost more.

BOS
MUC
Okay 5.3

Pros: Nice support people

Cons: Temperature too warm No room Couldn’t get an upgrade

Wed, 11 Dec
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
12h 51m
Wed, 15 Jan
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
13h 26m
£322
Trip: 36 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 3,422 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.2
Food
7.5
AMS
TXL
Excellent 10.0

Pros: Great airline

AMS
LIS
Good 7.3

Pros: Comfortable seat, great crew.

Cons: Flight delayed, no USB port and no entertainment

CPT
AMS
Excellent 9.3

Pros: The crew was amazing, flight on schedule and good entertainment.

Cons: Space is just reasonable on a long flight, even if there's seats more spacious that you could choose if you pay more.

OSL
AMS
Excellent 10.0

Pros: Good amount of space on the plane, lots of movies to watch, good food and drink.

AMS
JFK
Excellent 10.0

Pros: Yes

Cons: Everything was good

Sat, 9 Nov
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
12h 58m
Sat, 16 Nov
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
13h 22m
£324
Trip: 8 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 3,422 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.2
Food
7.5
AMS
LCY
Mediocre 3.3

Pros: The aircraft

Cons: No overbooking next time!

LAX
AMS
Excellent 8.3

Cons: Seats in economy section are very close together . There is not enough room for knees...especially for such a long trip.

OPO
AMS
Excellent 8.0

Pros: Fast boarding

Cons: Slow in refuelling, got us delayed for 40-

LIS
AMS
Good 6.4

Pros: The crew tried to be helpful but were equally frustrated with the ground crew.

Cons: Follow your own policies. Allow people to board (economy plus) with their hand luggage who have followed all the rules and chosen a seat in the front of the plane. My daughter and my KLM approved baggage were taken by the boarding crew while allowing other passengers to go with more than allowed

AMS
IAD
Excellent 8.6

Pros: Food was great, enjoyed watching videos, staff very profession and friendly.

Cons: Boarding was delayed and prolonged My Baggage was not transferred and was not available when I arrived in Dulles.

Mon, 13 Apr
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
24h 25m
Mon, 27 Apr
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
12h 35m
£337
Trip: 15 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 26,960 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.6
EWR
FRA
Good 7.2

Pros: Service was excellent, amazing professional crew, vegetarian friendly pasta dinner option was delicious

Cons: Metal bars in the middle of the leg room space make stowing a small carry on under the seat in front of you impossible for all passengers in a row. Also awkward to place feet around. No direct air vents so I felt hot even wearing just a t shirt. Breakfast not as good

MUC
LAX
Excellent 10.0

Pros: Free drinks. Two hot meals during flight. Lots of entertainment choices. Extra storage bin under window which doubled as large armrest. Ample legroom. Live sports on TV

FRA
IAD
Good 7.6

Pros: Very nice airline

Cons: Food was lacking

MUC
IAD
Excellent 9.3

Pros: Entertainment options were great crew was very friendly

Cons: Seat could be more comfortable

MUC
BOS
Good 7.0

Pros: TV series “The Name of the Rose” that I really wanted to watch for some time

Cons: Water, water, water... I almost died from dehydration

Thu, 23 Apr
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
13h 52m
Sun, 26 Apr
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
14h 23m
£329
Trip: 4 days
7.8GoodShow reviews
Overall 7.8 Good
Based on 3,422 reviews
Overall
8.0
Boarding
8.0
Comfort
7.7
Crew
8.5
Entertainment
7.2
Food
7.5
AMS
JFK
Okay 4.0

Cons: Crew members in Amsterdam were very rude and disrespectful

BOD
AMS
Excellent 10.0

Pros: The pilot and the crews were helpful about the transit. Pilot make up a lot of time.

Cons: Flight was delayed, had to run to my next connection flight.

CGK
KUL
Excellent 10.0

Pros: Excellent crew, good food & movie selection.

AMS
AUH
Excellent 10.0

Pros: Seats were super comfortable, bigger than most planes with extra leg room. Food was excellent and fresh, amazing Dutch cheese sampler was divine. No nonsense staff who had all connecting flight info on hand when we arrived in Abu Dhabi. KLM staff were friendly and efficient. Fabulous airline.

AMS
LIS
Good 7.3

Pros: Comfortable seat, great crew.

Cons: Flight delayed, no USB port and no entertainment

Tue, 7 Jan
LHR
London Heathrow
SEA
Seattle/Tacoma Intl
16h 18m
Wed, 8 Jan
SEA
Seattle/Tacoma Intl
LHR
London Heathrow
13h 00m
£371
Trip: 2 days
8.0ExcellentShow reviews
Overall 8.0 Excellent
Based on 26,960 reviews
Overall
8.1
Boarding
8.1
Comfort
7.9
Crew
8.5
Entertainment
7.7
Food
7.6
FCO
MUC
Excellent 10.0

Pros: We had a “light” fare which didn’t include checked bags, but airline let us check our carryon bags for free

Cons: Nothing

MUC
CDG
Good 6.4

Pros: Crew

Cons: We were delayed thirty minutes due to slow service. Zero entertainment and only a brownie for a snack

PHL
FRA
Excellent 8.0

Cons: Service desk personnel at the gate were very helpful and attentive. The plane was only 1/2-2/3 full, which made boarding quicker. The food was tasty and coffee was great! We were also offered juice twice during the flight. Bathrooms were clean. Since the plane wasn't full, they weren't dirty even at the end of the flight. I brought my own headphones, but the stewards provided them if you need them. My one big complaint was that our seats did not recline, thus making any kind of shut-eye near impossible. Our plane left and hour late, but the pilots stepped on the gas and we got in on time!

KBP
FRA
Mediocre 3.3

Cons: The only company that constantly delays flights. Narrow and uncomfortable places in the business class. They waited 4 days for the suitcase! They are not responsible for receiving compensation for the delay in suitcases! Where to write and call?

MUC
ATH
Excellent 8.0

Pros: Good crew.

Cons: More comfortable seating.

*
Prices are per person, are for e–tickets and include all taxes & fees in GBP.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller
At KAYAK we don’t set prices, so it’s not possible for us to guarantee what other companies are selling.

We aggregate tons of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we don't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car hires can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find on occasion that certain prices are no longer available.

More questions or if you have a bad price to report to us
Please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
1
  • Return
  • One-way
  • Multi-city
  • Economy
  • Premium Economy
  • Business
  • First
  • Multiple
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First
Economy
  • Economy
  • Premium Economy
  • Business
  • First