LHR - PWM

£450 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 10/8. 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 Portland

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Portland, 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 London to Portland, 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
£530
Typical prices: £773-£582
JetBlue
Mon 21/9Mon 28/9
LHR - PWM • 1 stop
Cheapest one-way flight
£450
Multiple Airlines
Mon 10/8
LHR - PWM • 3 stops
Top airlines
Cheapest • from £530 (return)
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
Cheapest • Avg £838 (return)
Shortest trip • 11h 36m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% 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 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

Mon, 21 Sep - Mon, 28 Sep
JetBlue Logo
08:15 - 23:52
LHR
-
PWM
20h 37m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£530JetBlue
Wed, 8 Jul - Mon, 13 Jul
JetBlue Logo
08:15 - 00:16
LHR
-
PWM
21h 01m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£551JetBlue
Tue, 7 Jul - Tue, 14 Jul
JetBlue Logo
11:55 - 13:45
LHR
-
PWM
30h 50m
1 stop
JetBlue Logo
13:25 - 09:30
PWM
-
LHR
15h 05m
1 stop
£573JetBlue
Wed, 8 Jul - Mon, 13 Jul
JetBlue Logo
08:15 - 00:16
LHR
-
PWM
21h 01m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£574JetBlue
Sat, 29 Aug - Wed, 2 Sep
JetBlue Logo
08:15 - 12:21
LHR
-
PWM
33h 06m
1 stop
JetBlue Logo
14:40 - 20:45
PWM
-
LHR
25h 05m
1 stop
£599JetBlue
Mon, 6 Jul - Fri, 24 Jul
JetBlue Logo
08:15 - 12:30
LHR
-
PWM
33h 15m
1 stop
JetBlue Logo
14:40 - 20:45
PWM
-
LHR
25h 05m
1 stop
£640JetBlue
Mon, 6 Jul - Mon, 13 Jul
JetBlue Logo
08:15 - 12:30
LHR
-
PWM
33h 15m
1 stop
JetBlue Logo
06:00 - 20:45
PWM
-
LHR
9h 45m
1 stop
£644JetBlue
Mon, 21 Sep - Mon, 28 Sep
United Airlines Logo
07:30 - 18:29
LHR
-
PWM
15h 59m
2 stops
United Airlines Logo
11:35 - 06:45
PWM
-
LHR
14h 10m
1 stop
£667United Airlines
Fri, 28 Aug - Sun, 6 Sep
Multiple Airlines Logo
11:55 - 00:14
LHR
-
PWM
17h 19m
1 stop
Multiple Airlines Logo
06:00 - 07:40
PWM
-
LHR
20h 40m
2 stops
£681Multiple Airlines
Tue, 7 Jul - Tue, 14 Jul
JetBlue Logo
11:55 - 13:45
LHR
-
PWM
30h 50m
1 stop
JetBlue Logo
13:25 - 06:30
PWM
-
LHR
12h 05m
2 stops
£692JetBlue
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.

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 £1,057 and £840 respectively.

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

Low seasonMay
Cheapest flight£450
Best time to beat the crowds (20% less expensive on average)
Most popular time to fly and prices are also 6% lower 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 3 days, the lowest price for a flight from London Heathrow Airport to Portland was £450 for a one-way ticket and £530 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 9805 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

10.0 ExcellentClaudia, Jun 2026
SAN - SFO
Read more United Airlines reviews

The staff was extremely helpful and friendly at all times! They went above and beyond to get us into an earlier flight in San Diego to make our connection in SFO possible, because our original flight did actually not make it! I did so much appreciate the UA team and how they made this possible. We also didn’t have seats together on the long flight to Singapore, but they found us seats together last moment with no additional cost! Nobody sat next to us, so that we were able to sleep! Thanks to UA for improving their service and Underpricer for booking this trip! Please be careful: 1,5 hrs for transfer in San Francisco might not be enough time in the future

Over 2.5 hour maintenance delay on first morning flight with no acknowledgement, compensation or even gesture of good will. Aircraft had overnighted at airport so issue should have been addressed prior to boarding. Over 3.5 hours before first slow and deliberate beverage service.

I flew from Barcelona to Chicago on UA yesterday. The flight was on time, the pilots did a great job and the flight attendants were super nice. All of them. Also food was good, and the drinks, including wine were served a few times during our flight. I highly recommend this airline.

Referencing ANA'S service to Japan and the return on UA, the pillow was awful, the crew was not very attentive, and the food was bizarre and tasted okay. Whoever's idea it was to make vegetable tempera in a steam capsule should probably revisit that. Since it was the vegetarian option, it was my only choice.

Crew was great! Good meals. Had room to stretch out

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

Boarding was smooth and efficient. The only food was some pretzels, but it was a short flight. Not much to order if you were hungry.

Crew were welcoming, accommodating and they worked hard to find places for all carry on.

Packed flight, which makes it tough on crew and boarding staff (and the customers of course). But this was great boarding, clear instructions, etc. Traveling on the weekends are always fraught with danger as you have families and less frequent flyers thus more confusion. But this flight went as planned.

Destroyed my suitcase. Tired of talking about it. Cancelling my unite mileage plus account.

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

Information on your arrival and departure airports