Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from London Heathrow Airport to Portland from £562

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London Heathrow Airport to Portland departing on 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from London Heathrow Airport to Portland

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
11:10 - 23:09LHR-PWM
16h 59m2 stops
United Airlines Logo
06:00 - 05:55PWM-LHR
18h 55m2 stops
£562United Airlines
Find Deal
Mon, 8 Dec - Mon, 15 Dec
United Airlines Logo
12:05 - 23:20LHR-PWM
16h 15m2 stops
United Airlines Logo
16:00 - 09:10PWM-LHR
13h 10m1 stop
£563United Airlines
Find Deal
Mon, 2 Mar - Mon, 9 Mar
United Airlines Logo
11:10 - 23:20LHR-PWM
17h 10m2 stops
United Airlines Logo
16:25 - 05:55PWM-LHR
33h 30m1 stop
£574United Airlines
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Austrian Airlines Logo
08:00 - 18:42LHR-PWM
15h 42m1 stop
Austrian Airlines Logo
10:35 - 09:10PWM-LHR
17h 35m1 stop
£586Austrian Airlines
Find Deal
Mon, 8 Dec - Mon, 15 Dec
Lufthansa Logo
16:00 - 23:20LHR-PWM
12h 20m1 stop
Lufthansa Logo
19:10 - 21:20PWM-LHR
22h 10m1 stop
£595Lufthansa
Find Deal
Wed, 4 Mar - Sun, 8 Mar
Air Canada Logo
13:25 - 23:20LHR-PWM
38h 55m2 stops
Air Canada Logo
06:00 - 20:35PWM-LHR
34h 35m2 stops
£600Air Canada
Find Deal
Mon, 2 Mar - Sun, 8 Mar
Air Canada Logo
13:25 - 23:11LHR-PWM
38h 46m2 stops
Air Canada Logo
06:00 - 06:30PWM-LHR
20h 30m2 stops
£627Air Canada
Find Deal
Thu, 5 Mar - Mon, 9 Mar
KLM Logo
10:10 - 21:59LHR-PWM
16h 49m2 stops
KLM Logo
16:50 - 08:45PWM-LHR
11h 55m1 stop
£687KLM
Find Deal
Thu, 5 Mar - Sun, 8 Mar
KLM Logo
10:10 - 21:59LHR-PWM
16h 49m2 stops
KLM Logo
14:35 - 08:05PWM-LHR
12h 30m1 stop
£734KLM
Find Deal
Wed, 4 Mar - Sat, 7 Mar
Austrian Airlines Logo
09:10 - 18:13LHR-PWM
13h 03m1 stop
Austrian Airlines Logo
11:17 - 05:55PWM-LHR
13h 38m1 stop
£883Austrian Airlines
Find Deal
Sat, 28 Mar - Tue, 31 Mar

KLM flights from London Heathrow Airport to Portland, Maine

Our best KLM deals on London Heathrow Airport to Portland, Maine flight tickets
KLM
5 Mar
LHR10:10London Heathrow
16h 49m
2 stops
PWM21:59Portland
8 Mar
PWM16:50Portland
11h 55m
1 stop
LHR08:45London Heathrow
£687
Find similar
KLM
4 Mar
LHR10:10London Heathrow
16h 49m
2 stops
PWM21:59Portland
7 Mar
PWM14:35Portland
12h 30m
1 stop
LHR08:05London Heathrow
£734
Find similar
KLM
23 Nov
LHR09:40London Heathrow
17h 39m
2 stops
PWM22:19Portland
29 Nov
PWM06:35Portland
20h 30m
1 stop
LHR08:05London Heathrow
£823
Find similar

Austrian Airlines flights from London Heathrow Airport to Portland, Maine

Our best Austrian Airlines deals on London Heathrow Airport to Portland, Maine flight tickets
Austrian Airlines
8 Dec
LHR08:00London Heathrow
15h 42m
1 stop
PWM18:42Portland
15 Dec
PWM10:35Portland
17h 35m
1 stop
LHR09:10London Heathrow
£586
Find similar
Austrian Airlines
28 Mar
LHR09:10London Heathrow
13h 03m
1 stop
PWM18:13Portland
31 Mar
PWM11:17Portland
13h 38m
1 stop
LHR05:55London Heathrow
£883
Find similar
Austrian Airlines
28 Mar
LHR09:10London Heathrow
13h 03m
1 stop
PWM18:13Portland
31 Mar
PWM11:17Portland
13h 38m
1 stop
LHR05:55London Heathrow
£884
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from London Heathrow Airport to Portland, Maine that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 25 October 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 8/12

11:10-23:09

2 stops16h 59m

Portland

Mon 15/12

06:00-05:55

2 stops18h 55m

£562

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/3

12:05-23:20

2 stops16h 15m

Portland

Mon 9/3

16:00-09:10

1 stop13h 10m

£563

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 4/3

11:10-23:20

2 stops17h 10m

Portland

Sun 8/3

16:25-05:55

1 stop33h 30m

£574

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 8/12

08:00-18:42

1 stop15h 42m

Portland

Mon 15/12

10:35-09:10

1 stop17h 35m

£586

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 4/3

16:00-23:20

1 stop12h 20m

Portland

Sun 8/3

19:10-21:20

1 stop22h 10m

£595

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/3

13:25-23:20

2 stops38h 55m

Portland

Sun 8/3

06:00-20:35

2 stops34h 35m

£600

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/3

13:25-23:11

2 stops38h 46m

Portland

Mon 9/3

06:00-06:30

2 stops20h 30m

£627

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/3

10:10-21:59

2 stops16h 49m

Portland

Sun 8/3

16:50-08:45

1 stop11h 55m

£687

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 4/3

10:10-21:59

2 stops16h 49m

Portland

Sat 7/3

14:35-08:05

1 stop12h 30m

£734

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 28/3

09:10-18:13

1 stop13h 03m

Portland

Tue 31/3

11:17-05:55

1 stop13h 38m

£883

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

See travel insights to Portland from

How to get the cheapest flight ticket from London Heathrow Airport to Portland, Maine

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London Heathrow Airport and Portland, Maine?

What is the cheapest month to fly to Portland, Maine?

The cheapest month to fly to Portland, Maine from London Heathrow Airport is in February. Flight prices, which tend to average around £505, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Portland, Maine, with average flight prices from London Heathrow Airport averaging around £559.

What is the cheapest day to depart on your flight to Portland, Maine?

According to our data, Monday is the cheapest day to fly to Portland, Maine from London Heathrow Airport. The lowest ticket price found for a Monday departure recently was £642. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to Portland, Maine on Friday is £784.

What is the cheapest time of day to depart on your flight to Portland, Maine?

Our data shows that the cheapest London Heathrow Airport to Portland, Maine flights are usually those with departure times in the evening. Our users have found flights to Portland, Maine in the evening for as low as £602. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £791 on average. Flights to Portland, Maine from London Heathrow Airport in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Can stopping save me money on London Heathrow Airport to Portland, Maine flights?

You could potentially save up to 34% on your flight if you consider stops on a London Heathrow Airport to Portland, Maine flight.

When to book flights from London Heathrow Airport to Portland, Maine

Are you open to changing your travel dates? Check out the ideal times to fly from London Heathrow Airport to Portland, Maine according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London Heathrow Airport to Portland, Maine (LHR to PWM) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Heathrow Airport to Portland, Maine

Direct flights

None
There are no direct flights from London Heathrow Airport to Portland, Maine. There are no popular flight routes from London Heathrow Airport to Portland, Maine.
Search flight deals

  • How far is London Heathrow to Portland by plane?

    A flight from London Heathrow to Portland will travel around 3170.3 mi. Flights usually cover this in 11h 13m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from London Heathrow Airport to Portland Airport?

    Prices for flights from London Heathrow Airport to Portland Airport are updated daily.

  • How many operators does momondo search for flights from London Heathrow Airport to Portland Airport?

  • How old do you have to be to fly from London Heathrow Airport to Portland Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London Heathrow Airport to Portland Airport.

  • What documentation or ID do you need to fly to Portland Airport?

    The travel and health documents required for your trip to Portland Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portland Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from London Heathrow Airport to Portland, Maine?

Best airlines flying from London Heathrow Airport to Portland, Maine

Compare and see reviews for airlines that fly from London Heathrow Airport to Portland, Maine with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £387Free CancellationRating
7.1
561 reviews
Search Icelandair flights
JetBluePriceFrom £402Free CancellationRating
7.2
2,909 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom £475Free CancellationRating
7.5
670 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £476Free CancellationRating
7.6
1,333 reviews
Search Finnair flights
KLMPriceFrom £504Free CancellationRating
7.7
1,405 reviews
Search KLM flights
United AirlinesPriceFrom £561Free CancellationRating
7.4
8,999 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from London to Portland?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Portland from London.

Can I find flights from London to Portland with flexible booking policies on momondo?

All flight searches from London to Portland on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from London to Portland?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from London to Portland.

I’m not ready to book a flight from London to Portland right now. Can momondo alert me if prices change?

Price alerts on flights to Portland from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your Portland, Maine trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 24/11
Mon 1/12
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States

Airports servicing Maine

Bangor Airport