PDX - LHR

£375 Find Cheap Flights from Portland to London Heathrow Airport

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight from Portland to Heathrow departing on 6/10. 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
1 adult, Economy

KAYAK searches 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 Portland 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 Portland to London, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Portland to Heathrow (PDX-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Portland 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 for you by selecting your travel dates on KAYAK.

Recent return flight deals from Portland to Heathrow

Mon, 6 Oct - Thu, 9 Oct
United Airlines Logo
19:40 - 13:20PDX-LHR
33h 40m1 stop
United Airlines Logo
06:30 - 18:46LHR-PDX
20h 16m2 stops
£375United Airlines
Find Deal
Mon, 17 Nov - Wed, 19 Nov
 Logo
15:25 - 11:50PDX-LHR
12h 25m1 stop
 Logo
08:55 - 22:33LHR-PDX
21h 38m2 stops
Wed, 22 Oct - Wed, 5 Nov
Icelandair Logo
15:20 - 11:55PDX-LHR
12h 35m1 stop
Icelandair Logo
12:15 - 17:00LHR-PDX
12h 45m1 stop
£406Icelandair
Find Deal
Wed, 22 Oct - Fri, 31 Oct
Icelandair Logo
15:20 - 11:55PDX-LHR
12h 35m1 stop
Icelandair Logo
12:15 - 18:00LHR-PDX
12h 45m1 stop
£406Icelandair
Find Deal
Mon, 6 Oct - Wed, 22 Oct
Air Canada Logo
06:15 - 09:35PDX-LHR
19h 20m2 stops
Air Canada Logo
08:40 - 18:46LHR-PDX
18h 06m2 stops
£455Air Canada
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Tue, 23 Sep - Thu, 2 Oct
Air Canada Logo
07:00 - 09:35PDX-LHR
18h 35m2 stops
Air Canada Logo
08:40 - 23:01LHR-PDX
22h 21m2 stops
£458Air Canada
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Wed, 22 Oct - Fri, 31 Oct
British Airways Logo
13:15 - 10:30PDX-LHR
13h 15m1 stop
British Airways Logo
14:20 - 17:35LHR-PDX
10h 15mdirect
£472British Airways
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Sun, 21 Sep - Tue, 30 Sep
British Airways Logo
19:25 - 13:00PDX-LHR
9h 35mdirect
British Airways Logo
15:30 - 23:54LHR-PDX
16h 24m1 stop
£475British Airways
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Sun, 10 Aug - Thu, 21 Aug
Iberia Logo
11:35 - 10:50PDX-LHR
15h 15m1 stop
Iberia Logo
15:10 - 23:07LHR-PDX
15h 57m1 stop
£499Iberia
Find Deal
Sun, 19 Oct - Sun, 2 Nov
Iberia Logo
19:25 - 13:00PDX-LHR
9h 35mdirect
Iberia Logo
14:55 - 22:52LHR-PDX
15h 57m1 stop
£533Iberia
Find Deal
Expert advice

Expert advice for your flight from Portland to Heathrow

 
Snippets provided in this section are AI-generated based on a summarisation of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Finnair

Finnair's A350 features lower cabin altitude and higher humidity, enhancing passenger comfort.


Finnair's Wi-Fi is available on most long-haul flights, keeping you connected at good speeds.

Read more about Finnairby Gabriel Leigh
British Airways

Upgrade to premium economy for 18 cm extra legroom, enhancing comfort on long flights.


BA's premium economy offers priority boarding and larger baggage allowance for long-haul comfort.

Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Duncan Madden

Duncan Madden

Expert on British Airways

Duncan Madden

Duncan Madden

Duncan is a freelance travel writer, copywriter and book author in constant search of travel stories and the perpetual sensation of being on holiday. He’s never happier than when on a dusty trail in search of empty waves or ducking under the piste tape in search of snowbound solitude. British born, living in Germany, but happiest heading for the horizon. His first book, Found in Translation, explores the etymologies and stories of country names around the world and is out now.

Read more
Useful Info

KAYAK's insights & trends for Portland to Heathrow flights

Get data-powered insights and trends into flights from Portland 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 Portland to London Heathrow Airport?

The average price of all round-trip flights from Portland to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to London Heathrow Airport on a Friday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Portland to London Heathrow Airport. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Portland 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 Portland to London Heathrow Airport is October, where tickets cost £503 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £996 and £783 respectively.

Can I save money by flying with a stopover from Portland to London Heathrow Airport?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £859, prices are generally cheapest when you fly direct.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Portland to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Portland to London Heathrow Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 19 weeks before departure.


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

Low seasonFebruary
High seasonSeptember
Cheapest flight£146
Best time to beat the crowds (14% less expensive on average)
Most popular time to fly and prices are also 6% lower on average.
Flight from Portland to London Heathrow Airport

When to book flights from Portland to Heathrow

Are your dates flexible? Find out the best times to travel from Portland 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 Portland to London Heathrow Airport flights

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

    In the last 3 days, the lowest price for a flight from Portland to London Heathrow Airport was £199 for a one-way ticket and £510 for a return.

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

    Portland and London Heathrow Airport are both served by 1 main airport. You will leave Portland from Portland and will be arriving at London Heathrow.

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

    All the following airlines offer inflight Wi-Fi service on the Portland to London Heathrow Airport flight route: American Airlines, KLM, Delta, Virgin Atlantic, Air France, Iberia, British Airways, and Vueling.

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

    The Boeing 787-10 Dreamliner is the aircraft model that flies most regularly on the Portland to London Heathrow Airport flight route.

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

    oneworld is the only airline alliance operating flights between Portland and London Heathrow Airport.

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

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

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

    The two airlines most popular with KAYAK users for flights from Portland to London are Virgin Atlantic and Iberia. With an average price for the route of £494 and an overall rating of 7.4, Virgin Atlantic is the most popular choice. Iberia is also a great choice for the route, with an average price of £547 and an overall rating of 7.0.

  • How does KAYAK find such low prices on flights from Portland 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 Portland to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Portland 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 Portland 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 Portland 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 Portland with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Portland 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 Portland up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Portland to London Heathrow Airport

  • Looking for a cheap flight from London Heathrow Airport to Portland? 25% of our users found flights on this route for £441 or less one-way and £730 or less round-trip.

Prefer to fly direct from Portland to London Heathrow Airport?

Find which airlines fly direct from Portland Airport to London Heathrow Airport, which days they fly and book direct flights.

Direct departures

Portland to London Heathrow

Monday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Tuesday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Wednesday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Thursday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Friday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Saturday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Sunday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

See more direct flights

Direct returns

London Heathrow to Portland

Monday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Tuesday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Wednesday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Thursday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Friday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Saturday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

Sunday

Aer Lingus, Alaska Airlines, American Airlines, +4 more

Aer Lingus, Alaska Airlines, +5 more

See more direct flights
See more direct flights

Top 4 airlines serving from Portland to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Portland 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 Portland 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.
7.4
Virgin AtlanticOverall score based on 652 reviews
7.5Entertainment
7.6Boarding
7.2Comfort
6.9Food
8.1Crew
Airline reviews

Super friendly and helpful staff, from check-in desk to cabin crew.

10.0 ExcellentJoe, May 2025JFK - MAN
Read more Virgin Atlantic reviews

Super friendly and helpful staff, from check-in desk to cabin crew.

Following a paid seat upgrade for enhanced comfort, I encountered an unacceptable odor in my assigned area. It took three hours for the crew to relocate me, and the replacement seat was unacceptably close to the lavatory, offering no improvement.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

I did not fly by vergin atlantic from bangalore to vasco da gama

Your flight delayed at Heathrow n I almost missed my mother funeral.you idiots. I had to waste 10 hours in different airports. Thank your stars I'm not suing you.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

We had an unfortunate experience where we had to leave the aircraft after boarding, shortly before the scheduled takeoff time, and re-board. The reason given was that a passenger felt ill and had to cancel their plans and therefor their luggage had to be found and removed.

We’ve used VA before many times the experience is always been good they have lovely staff and the food is always delicious.

Everything about the flight was amazing from check in to boarding entertainment was okay food we didn’t try.

Seats in premier saga class were narrow and hard. Very uncomfortable for a 5-hour flight.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

I had an exit row and so was Comfortable on the long flight.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

The flights were in time and the bags arrived. well done

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Booked with Kayak… Economy Class it said. I had filtered for 1 checked bag. Get to boarding and it says I have Economy Light w/ no checked bags. $136 each way for baggage now. Do not use smartfares.com. Very misleading and a terrible start to this trip.

From boarding, to attention in flight, I couldn’t fault it.

Not having to check carry on bags when plane wasn’t full. (The told us it was)

I was in business class for the 8 hour flight where: 1. The WiFi did not work 2. The entertainment system did not work 3. We were told there were no hot drinks for the entire flight

I had an issue with the name on my ticket vs my passport name. I was very upset that the Iberia ticket clerk had no authorization to help me and I was left to fix it. It took 19 calls of persons promising to accomplish and not doing anything before I reached someone who helped me in 10 minutes. Two of them even hung up on me. I missed my original flight because of this. Terrible customer service.

The flight was delayed twice. When the crew explained about the debris causing flat tires, I was glad they took the time to change all four.

My carry-on bag was taken from me when I boarded. It was checked through to London at no charge. It took a big of shuffling, but I was glad not to need to mind it until baggage claim.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Flight delayed Service could be better Iberia staff are not really friendly

They cancelled the flight)(they said bad weather but many other flights took off) and made us wait 5 hours in line to figure out what to do. We ended up making a new flight the next day on another airlines...I hope they honor giving us our money back

Awful. The flight wasn't actually operated by Iberia, but by American Airlines. I was unable to get my boarding pass and as a result missed my connecting flight.

The payment system was not working so was unable to connect wifi the entire flight

everything to do with KAYAK was terrible. Your customer facing departments are utterly useless, timewasting and unhelpful.

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

The screen didn’t work and I didn’t get the seat upgrade I paid $300 for. They were no help with that,

Paid $180 for seat selection, and selection essnt honored. Have to call for a refund.

My flights were great and the crew on them was lovely especially the London to Barcelona flight as Al & AJ were so amazingly nice. I wish they would be my crew always as they have the best customer service. Sadly both flights were delayed the first one from Vegas was because they clearly loaded the cargo wrong the plane was off balance making us 2 hours late. This made me miss my connection and sadly it was challenging rebooking while I was on the flight. I will never use Kayak again as there was no customer service number or live chat and you rebooked me on a flight 2 days later. I had my mom call BA to change it which she did after spending an hour on hold. This should not be so difficult. My second flight was an hour delayed due to not being able to disconnect the bridge from the plane but I did finally make it home.

The delay was not communicated via text and the person who helped with check in also didn’t inform me about the delay. I ended up missing my connection and it was a waste of 5 hours. The crew didn’t mention there would be someone at the gate informing of if I would be rebooked and there was no signage. Overall a very poor experience. The British Airways app was also very buggy, and didn’t work. I will avoid flying with British Airways when possible.

A little better than outward journey but mild chaos at the boarding gate because some people with boarding cards from connecting flights had cards which weren't recognised

The BA business class cabin is excellent,very comfortable for sleeping but the service could be improved.

Surly rude flight attendants. I ordered the chicken and was given a vegetarian meal with no explanation and no opportunity to change it. I tried to order another beverage and was told by the young humorless flight attendant to “wait”. And she never came back. The seats were very uncomfortable and cramped. The last time I flew British Airways was many years ago but I remember it was amazing and the crew were very charming. This was a terrible disappointment given the cost of the flight.

Everything you need to know for your flight from Portland to Heathrow

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