LHR - PWM

£413 Find Cheap Flights from London Heathrow Airport to Portland – Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Portland departing on 1/12. 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

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Everything you should know

Cheapest return fare
£484
Typical prices: £581-£1,570
JetBlue
Thu 3/9Thu 17/9
LHR - PWM • 1 stop
Cheapest one-way flight
£413
Multiple Airlines
Tue 1/12
LHR - PWM • 2 stops
Top airlines
JetBlue
Cheapest • from £484 (return)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Direct flights
Not available
There are currently no direct flights between Heathrow and Portland. You’ll need at least 1 connection.
Insights
Insights
Insights
Insights
Top stopover airports
New York (JFK)
Cheapest • Avg £811 (return)
Newark (EWR)
Shortest trip • 11h 36m (one-way)
Insights
Insights
Insights
Insights
When to travel
December
Cheapest • 100% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches hundreds of sites at once to find you the best travel deals.
We hope you love your trip to Portland!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Heathrow to Portland (LHR-PWM)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Portland 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 Heathrow to Portland

Thu, 3 Sep - Thu, 17 Sep
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£484JetBlue
Wed, 9 Sep - Wed, 16 Sep
JetBlue Logo
08:15 - 23:54
LHR
-
PWM
20h 39m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£500JetBlue
Wed, 2 Sep - Wed, 9 Sep
JetBlue Logo
11:55 - 00:25
LHR
-
PWM
17h 30m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£532JetBlue
Fri, 4 Sep - Fri, 11 Sep
JetBlue Logo
08:15 - 00:25
LHR
-
PWM
21h 10m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£534JetBlue
Mon, 14 Sep - Mon, 21 Sep
JetBlue Logo
11:55 - 23:54
LHR
-
PWM
16h 59m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£536JetBlue
Tue, 22 Sep - Tue, 29 Sep
JetBlue Logo
08:15 - 23:54
LHR
-
PWM
20h 39m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£540JetBlue
Wed, 7 Oct - Sun, 11 Oct
JetBlue Logo
08:15 - 23:54
LHR
-
PWM
20h 39m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£540JetBlue
Mon, 21 Sep - Mon, 28 Sep
JetBlue Logo
11:55 - 23:54
LHR
-
PWM
16h 59m
1 stop
JetBlue Logo
06:00 - 09:30
PWM
-
LHR
22h 30m
1 stop
£547JetBlue
Mon, 2 Nov - Sun, 8 Nov
United Airlines Logo
12:05 - 23:21
LHR
-
PWM
16h 16m
2 stops
United Airlines Logo
15:10 - 20:35
PWM
-
LHR
24h 25m
1 stop
£711United Airlines
Tue, 3 Nov - Sun, 8 Nov
United Airlines Logo
12:05 - 23:21
LHR
-
PWM
16h 16m
2 stops
United Airlines Logo
10:50 - 21:20
PWM
-
LHR
29h 30m
1 stop
£711United Airlines
Booking Insights

KAYAK’s insights & trends for Heathrow to Portland flights

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

How much is a return flight from London Heathrow Airport to Portland, Maine?

This analysis is based on the cheapest return trip price found on KAYAK in the last 12 months by searching for a flight from London Heathrow Airport to Portland, Maine departing in September.

Flight prices are below average for this route right now.

Flights to Portland, Maine from London Heathrow Airport usually cost between £736 and £1,056 in September.
The lowest price found in the past 5 days was £484 on JetBlue (3 Sept–17 Sept).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Portland, 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 London Heathrow Airport to Portland is December, where tickets cost £0 (return) on average. On the other hand, the most expensive months are August and June, where the average cost of round-trip tickets is £974 and £836 respectively.

Find deals

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

Low season

May

Cheapest flight

£413
Best time to beat the crowds (21% less expensive on average)
Most popular time to fly (45% more expensive on average)
Flight from London Heathrow Airport to Portland

When to book flights from Heathrow to Portland

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

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

    In the last 5 days, the lowest price for a flight from London Heathrow Airport to Portland was £413 for a one-way ticket and £484 for a return.

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

    When flying out of London Heathrow Airport you will be using London Heathrow. You will be landing at Portland, also known as Portland.

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

    We unfortunately don’t have that data for this specific route.

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

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

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

    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 London Heathrow Airport to Portland.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Portland from London Heathrow Airport 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 London Heathrow Airport to Portland?

    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 Portland with an airline and back to London Heathrow Airport with another airline.

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

    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 Portland from London Heathrow Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Heathrow to Portland

 
See real verified KAYAK customer reviews for airlines flying from London to Portland. 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 Heathrow to Portland? 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
United AirlinesOverall score based on 10053 reviews
7.7Boarding
8.1Crew
7.1Entertainment
7.3Comfort
6.7Food
Airline reviews

Very friendly and helpful staff on board and United was excellent when I missed my onward flight due to the delay in London. Very well organised meant much less stress

8.0 ExcellentMarianne, May 2026
LHR - DEN
Read more United Airlines reviews

Very friendly and helpful staff on board and United was excellent when I missed my onward flight due to the delay in London. Very well organised meant much less stress

First time flying with UA and it was a great experience. Thank you

Staff on board was excellent. Positive upbeat helpful- like it used to be.

United has come a long way, it’s been a fantastic experience traveling with them.

The flight attendants were very rude, beyond comprehension. I took a business class from London to SFO for the first time on United. When I asked for a second piece of bread during dinner, the serving attendant threw a 3rd bread on my plate and said, “here. You can have this one too”! I couldn’t believe the rudeness of the attendant. Most all attendants were very rude, unhelpful, sing the food was absolutely disgusting. Never fly United internationally in business class. My flight back to SFO was a nightmare!!

Our experience on United Airlines was extremely poor. The plane was extremely cold throughout our entire flight- which multiple people complained about- and we had to wait 2 hours to get a blanket which was too thin and barely helped warm us up. As well as this, none of the entertainment features were working so we had to sit through a roughly 10 hour flight with nothing to keep our attention, including the actual flight path screen. It was an extremely disappointing experience and I would hope that this gets fixed if we ever choose United Airlines again.

Cabin crew was very friendly, requests were satisfied promptly and cheerfully, and the cabin was reasonably clean when I boarded. The United lounges at Newark and Heathrow are always well-run and comfortable, especially Newark. I look forward to the new lounge that will be part of the rebuild of Terminal 2 at Heathrow.

The senior flight attendants were amazing. Totally different vibe from other carriers. Easy 10 hour flight in Business Class. Great food. Good humor as well.

I was lucky to sit in a seat with legroom in economy . The airplane felt like it was 100 years old, seats were very basic, barely reclined. Food was alright , staff was ok but not the friendliest. But all in all ok trip, perfectly on time

My wallet fell out of my pocket ( my fault). Staff claimed they looked while cleaning. Said they didn't find it, but was actually found in Washington DC on the plane. Which mean either they didn't look or don't do a good job of cleaning. Now I have to pay 27 dollars to get it shipped back and have no wallet for my entire vacation

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

Information on your arrival and departure airports

London Heathrow Airport (LHR)
Portland (PWM)