PDX - LHR

£196 Find Cheap Flights from Portland 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 Portland to Heathrow departing on 21/4. 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, 0 bags

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest return fare
£464
Overall average: £538
Icelandair
Tue 14/4Sat 25/4
PDX - LHR • 1 stop
Cheapest direct flights
£562
Typical prices: £520-£660
British Airways
Tue 14/4Tue 21/4
PDX - LHR • Direct
Advice from real travellers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Finnair's Wi-Fi offers good speeds on long-haul flights.
British Airways' premium economy adds 18 cm legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from £464 (return)
Best reviews • 7.1 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
You can fly direct with British Airways. Average duration is 9h 35m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top stopover airports
Cheapest • Avg £555 (return)
Shortest trip • 12h 01m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travellers who book at least 5 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Expert advice
Flight 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

Tue, 14 Apr - Sat, 25 Apr
Icelandair Logo
15:30 - 20:20
PDX
-
LHR
20h 50m
1 stop
Icelandair Logo
21:25 - 18:00
LHR
-
PDX
28h 35m
1 stop
£464Icelandair
Wed, 5 Aug - Wed, 19 Aug
Icelandair Logo
19:05 - 11:55
PDX
-
LHR
32h 50m
1 stop
Icelandair Logo
21:25 - 11:45
LHR
-
PDX
22h 20m
1 stop
£465Icelandair
Mon, 13 Apr - Tue, 21 Apr
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
21:25 - 18:00
LHR
-
PDX
28h 35m
1 stop
£468Icelandair
Mon, 13 Apr - Thu, 30 Apr
Icelandair Logo
15:30 - 20:20
PDX
-
LHR
20h 50m
1 stop
Icelandair Logo
21:25 - 18:00
LHR
-
PDX
28h 35m
1 stop
£470Icelandair
Thu, 3 Sep - Wed, 30 Sep
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
13:05 - 17:55
LHR
-
PDX
12h 50m
1 stop
£471Icelandair
Tue, 1 Sep - Tue, 15 Sep
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
13:05 - 17:55
LHR
-
PDX
12h 50m
1 stop
£472Icelandair
Tue, 18 Aug - Thu, 1 Oct
Icelandair Logo
15:30 - 11:55
PDX
-
LHR
12h 25m
1 stop
Icelandair Logo
21:25 - 17:55
LHR
-
PDX
28h 30m
1 stop
£474Icelandair
Sun, 6 Sep - Wed, 16 Sep
Icelandair Logo
19:05 - 20:20
PDX
-
LHR
17h 15m
1 stop
Icelandair Logo
13:05 - 17:55
LHR
-
PDX
12h 50m
1 stop
£474Icelandair
Wed, 9 Sep - Wed, 23 Sep
Icelandair Logo
19:05 - 20:20
PDX
-
LHR
17h 15m
1 stop
Icelandair Logo
13:05 - 17:55
LHR
-
PDX
12h 50m
1 stop
£475Icelandair
Wed, 2 Sep - Sat, 19 Sep
Icelandair Logo
19:05 - 20:20
PDX
-
LHR
17h 15m
1 stop
Icelandair Logo
21:25 - 17:55
LHR
-
PDX
28h 30m
1 stop
£476Icelandair
Booking Insights

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, Thursday is the most expensive day to fly from Portland to London Heathrow Airport. For your return ticket, we recommend flying on a Wednesday 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 £499 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is £980 and £809 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.

Yes, flying with a stopover may cost you more time, but you can also save money on the route, with a 2 stops stopover the cheapest option at £501 on average.

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 5 weeks before departure, which saves you about 26% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Expert advice

Expert advice for your flight from Portland to Heathrow

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Gabriel Leigh

Gabriel Leigh

Expert on Finnair

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.

Duncan Madden

Duncan Madden

Expert on British Airways

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.

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

Low seasonJanuary
Cheapest flight£196
Best time to beat the crowds (18% less expensive on average)
Most popular time to fly and prices are also 12% 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 £196 for a one-way ticket and £464 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?

    American Airlines, Iberia, and KLM offer inflight Wi-Fi service on the Portland to London Heathrow Airport flight route.

  • 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, Icelandair or British Airways?

    The two airlines most popular with KAYAK users for flights from Portland to London are Icelandair and British Airways. With an average price for the route of £452 and an overall rating of 7.1, Icelandair is the most popular choice. British Airways is also a great choice for the route, with an average price of £544 and an overall rating of 6.7.

  • 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 £278 or less one-way and £497 or less round-trip.

Prefer to fly direct from Portland to London Heathrow Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Portland to London Heathrow.
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

British Airways

British Airways

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Thursday

British Airways

British Airways

Friday

British Airways

British Airways

Saturday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Direct returns

London Heathrow to Portland

Monday

British Airways

British Airways

Tuesday

British Airways

British Airways

Wednesday

British Airways

British Airways

Thursday

British Airways

British Airways

Friday

British Airways

British Airways

Saturday

British Airways

British Airways

Sunday

British Airways

British Airways

See more direct flights

Reviews of the top airlines flying 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.
7.1
IcelandairOverall score based on 620 reviews
8.0Crew
7.0Entertainment
6.2Food
7.2Boarding
7.0Comfort
Airline reviews

Nice, quick flight. There were lots of empty seats so they told me I could sit next to the emergency exit where I would have more legroom.

10.0 ExcellentAnonymous, Feb 2026
KEF - GOH
Read more Icelandair reviews

Nice, quick flight. There were lots of empty seats so they told me I could sit next to the emergency exit where I would have more legroom.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

Overall satisfied and would fly with them again. They could improve the check-in efficiency at BOS, we got backed up because it seemed there were passengers requiring much more time for check in.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

Worth every penny to upgrade to BC. Treated and felt more like First Class

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

They had us seating down for one hour just waiting on the plane

Flying with BA is always a good experience—even in economy class. It is better if in business and first class. Timely, breeze through security and timely connections

We waited at BOS at the gate for an hour and couldn’t get a drink or anything. Once in the air the service, food and ride was excellent.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

The issue was not with BA it was with the link yoiu sent fopr booking the flight

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

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

Information on your arrival and departure airports