Cheap flights from London to Portland from £437

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from London to Portland departing on 27/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap return flights

JetBlue Logo
08:15 - 00:17LHR-PWM
21h 02m1 stop
JetBlue Logo
06:05 - 20:45PWM-LHR
9h 40m1 stop
£437JetBlue
Find Deal
Wed, 27 Aug - Wed, 3 Sep
JetBlue Logo
11:55 - 13:22LHR-PWM
30h 27m1 stop
JetBlue Logo
14:17 - 20:45PWM-LHR
25h 28m1 stop
£453JetBlue
Find Deal
Tue, 9 Sep - Tue, 16 Sep
JetBlue Logo
08:15 - 22:02LHR-PWM
18h 47m1 stop
JetBlue Logo
14:17 - 20:45PWM-LHR
25h 28m1 stop
£457JetBlue
Find Deal
Thu, 4 Sep - Tue, 9 Sep
JetBlue Logo
11:55 - 22:07LHR-PWM
15h 12m1 stop
JetBlue Logo
14:17 - 09:30PWM-LHR
14h 13m1 stop
£467JetBlue
Find Deal
Thu, 11 Sep - Thu, 18 Sep
Finnair Logo
13:20 - 23:45LHR-PWM
15h 25m2 stops
Finnair Logo
15:56 - 08:05PWM-LHR
11h 09m1 stop
£517Finnair
Find Deal
Thu, 11 Sep - Thu, 18 Sep
United Airlines Logo
08:00 - 18:38LHR-PWM
15h 38m1 stop
United Airlines Logo
06:00 - 05:55PWM-LHR
19h 55m2 stops
£540United Airlines
Find Deal
Sat, 25 Oct - Fri, 31 Oct
United Airlines Logo
09:30 - 18:38LHR-PWM
14h 08m1 stop
United Airlines Logo
05:00 - 13:45PWM-LHR
27h 45m2 stops
£544United Airlines
Find Deal
Sat, 25 Oct - Sun, 2 Nov
Finnair Logo
13:10 - 22:43LHR-PWM
14h 33m1 stop
Finnair Logo
12:27 - 06:20PWM-LHR
12h 53m2 stops
£549Finnair
Find Deal
Thu, 4 Sep - Tue, 9 Sep
Icelandair Logo
08:15 - 00:17LHR-PWM
21h 02m1 stop
Icelandair Logo
06:10 - 20:45PWM-LHR
9h 35m1 stop
£641Icelandair
Find Deal
Fri, 29 Aug - Sun, 31 Aug
Virgin Atlantic Logo
09:40 - 00:03LHR-PWM
19h 23m2 stops
Virgin Atlantic Logo
06:00 - 06:20PWM-LHR
19h 20m2 stops
£958Virgin Atlantic
Find Deal
Fri, 29 Aug - Sun, 31 Aug

JetBlue flights from London to Portland, Maine

Our best JetBlue deals on London to Portland, Maine flight tickets
JetBlue
27 Aug
LHR08:15London Heathrow
21h 02m
1 stop
PWM00:17Portland
3 Sept
PWM06:05Portland
9h 40m
1 stop
LHR20:45London Heathrow
JetBlue
9 Sept
LHR11:55London Heathrow
30h 27m
1 stop
PWM13:22Portland
16 Sept
PWM14:17Portland
25h 28m
1 stop
LHR20:45London Heathrow
JetBlue
4 Sept
LHR08:15London Heathrow
18h 47m
1 stop
PWM22:02Portland
9 Sept
PWM14:17Portland
25h 28m
1 stop
LHR20:45London Heathrow

Finnair flights from London to Portland, Maine

Our best Finnair deals on London to Portland, Maine flight tickets
Finnair
11 Sept
LHR13:20London Heathrow
15h 25m
2 stops
PWM23:45Portland
18 Sept
PWM15:56Portland
11h 09m
1 stop
LHR08:05London Heathrow
Finnair
4 Sept
LHR13:10London Heathrow
14h 33m
1 stop
PWM22:43Portland
9 Sept
PWM12:27Portland
12h 53m
2 stops
LHR06:20London Heathrow

momondo Fare Finder

 
Customise your flight search to find flights from London 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 30 July 2025.
Use the filters below to find and compare flights from London to Portland, Maine that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 27/8

08:15-00:17

1 stop21h 02m

Portland

Wed 3/9

06:05-20:45

1 stop9h 40m

£437

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 9/9

11:55-13:22

1 stop30h 27m

Portland

Tue 16/9

14:17-20:45

1 stop25h 28m

£453

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 4/9

08:15-22:02

1 stop18h 47m

Portland

Tue 9/9

14:17-20:45

1 stop25h 28m

£457

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

11:55-22:07

1 stop15h 12m

Portland

Thu 18/9

14:17-09:30

1 stop14h 13m

£467

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 11/9

13:20-23:45

2 stops15h 25m

Portland

Thu 18/9

15:56-08:05

1 stop11h 09m

£517

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 25/10

08:00-18:38

1 stop15h 38m

Portland

Fri 31/10

06:00-05:55

2 stops19h 55m

£540

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 25/10

09:30-18:38

1 stop14h 08m

Portland

Sun 2/11

05:00-13:45

2 stops27h 45m

£544

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 4/9

13:10-22:43

1 stop14h 33m

Portland

Tue 9/9

12:27-06:20

2 stops12h 53m

£549

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 29/8

08:15-00:17

1 stop21h 02m

Portland

Sun 31/8

06:10-20:45

1 stop9h 35m

£641

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 29/8

09:40-00:03

2 stops19h 23m

Portland

Sun 31/8

06:00-06:20

2 stops19h 20m

£958

Flights are sorted by cheapest return flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

See travel insights to Portland from

How to get the cheapest flight ticket from London 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 and Portland, Maine?

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

The cheapest month to fly to Portland, Maine from London is in February. Flight prices, which tend to average around £544, 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 averaging around £552.

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. The lowest ticket price found for a Monday departure recently was £641. 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 £782.

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

Our data shows that the cheapest London 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 £601. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £789 on average. Flights to Portland, Maine from London 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 to Portland, Maine flights?

You could potentially save up to 64% on your flight if you consider stops on a London to Portland, Maine flight.

When to book flights from London to Portland, Maine

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

Cheap London to Portland, Maine (LON to PWM) flight deals and tips

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

Best price found

£470

Fastest flight time

11h 26m

Direct flights

None

Airports in Portland, Maine

1 airport
The best one-way flight to Portland, Maine from London in the past 72 hours is £470. The best return flight deal from London to Portland, Maine found on momondo in the last 72 hours is £437.
The fastest flight from London to Portland, Maine takes 11h 26m
There are no direct flights from London to Portland, Maine. Popular non-direct route for this connection is London Heathrow Airport - Portland Airport.
There is 1 airport near Portland, Maine: Portland (PWM)

  • How far is London to Portland by plane?

    Portland is 3183.1 mi away from London. In terms of flight time, this usually takes a little over 11h 26m.

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

    Prices for flights from London to Portland Airport were last updated today.

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

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

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

    The necessary travel and health documents for your Portland Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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


Best airlines flying from London to Portland, Maine

Compare and see reviews for airlines that fly from London to Portland, Maine with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom £386Free CancellationRating
7.0
521 reviews
Search Icelandair flights
JetBluePriceFrom £401Free CancellationRating
7.2
2,913 reviews
Search JetBlue flights
Virgin AtlanticPriceFrom £472Free CancellationRating
7.4
655 reviews
Search Virgin Atlantic flights
FinnairPriceFrom £475Free CancellationRating
7.6
1,316 reviews
Search Finnair flights
KLMPriceFrom £485Free CancellationRating
7.8
1,383 reviews
Search KLM flights
LufthansaPriceFrom £515Free CancellationRating
6.8
7,265 reviews
Search Lufthansa flights
United AirlinesPriceFrom £559Free CancellationRating
7.4
8,899 reviews
Search United Airlines flights

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Freeport
North Conway

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to Portland . Millions of users trust and use momondo every year so you are in good hands.

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

Flights from London to Portland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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?

If you are simply researching potential flights to Portland, momondo offers a useful price alert feature which will track prices for flights to Portland from London and alert you when they change.


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1 adult
Mon 4/8
Mon 11/8

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Airports servicing Maine