Which airlines fly to London?

British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London from Portland, Maine according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when travelling to London. Keep in mind that there are 7 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to London?

JetBlue, United Airlines, and Delta are the most popular carriers operating from Portland to London

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

Prices for flights from Portland Airport to London refresh daily.

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

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 Portland Airport to London.

What documentation or ID do you need to fly to London?

The necessary travel and health documents for your London 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.

£245 Cheap Flights from Portland, Maine to London in 2026

Find the cheapest flights from Portland, Maine to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

11:17 - 09:10PWM Portland-LHR London Heathrow

16h 53m1 stop Newark

06:50 - 22:57LHR London Heathrow-PWM Portland

21h 07m2 stops Brussels Bruxelles-National Newark

£557United Airlines

Mon, 8 Feb - Wed, 10 Feb

15:15 - 12:00PWM Portland-LHR London Heathrow

15h 45m2 stops Newark Chicago O'Hare Intl

06:50 - 22:57LHR London Heathrow-PWM Portland

21h 07m2 stops Brussels Bruxelles-National Newark

£560United Airlines

Mon, 8 Feb - Wed, 10 Feb

14:15 - 09:00PWM Portland-LHR London Heathrow

13h 45m1 stop Atlanta Hartsfield-Jackson

06:30 - 23:33LHR London Heathrow-PWM Portland

22h 03m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£640Delta

Tue, 10 Nov - Tue, 24 Nov

16:03 - 10:30PWM Portland-LHR London Heathrow

13h 27m1 stop New York John F Kennedy Intl

10:00 - 23:55LHR London Heathrow-PWM Portland

18h 55m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£641Delta

Tue, 10 Nov - Tue, 24 Nov

16:03 - 10:30PWM Portland-LHR London Heathrow

13h 27m1 stop New York John F Kennedy Intl

10:00 - 23:55LHR London Heathrow-PWM Portland

18h 55m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£641Delta

Tue, 10 Nov - Tue, 17 Nov

12:50 - 09:00PWM Portland-LHR London Heathrow

15h 10m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

10:00 - 23:33LHR London Heathrow-PWM Portland

18h 33m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£643Delta

Tue, 10 Nov - Tue, 24 Nov

12:50 - 09:00PWM Portland-LHR London Heathrow

15h 10m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

08:40 - 23:55LHR London Heathrow-PWM Portland

20h 15m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£643Delta

Tue, 10 Nov - Tue, 17 Nov

16:20 - 13:45PWM Portland-LHR London Heathrow

16h 25m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

09:55 - 00:10LHR London Heathrow-PWM Portland

19h 15m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£643Delta

Wed, 23 Sep - Tue, 6 Oct

12:50 - 11:40PWM Portland-LHR London Heathrow

17h 50m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

06:30 - 23:55LHR London Heathrow-PWM Portland

22h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£643Delta

Tue, 10 Nov - Tue, 17 Nov

06:00 - 20:45PWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

08:15 - 23:54LHR London Heathrow-PWM Portland

20h 39m1 stop New York John F Kennedy Intl

£652JetBlue

Tue, 15 Sep - Mon, 21 Sep

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:10 - 20:45PWM Portland-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 - 23:54LHR London Heathrow-PWM Portland

16h 59m1 stop New York John F Kennedy Intl

£663JetBlue

Fri, 21 Aug - Thu, 10 Sep

06:10 - 20:45PWM Portland-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 - 00:25LHR London Heathrow-PWM Portland

17h 30m1 stop New York John F Kennedy Intl

£663JetBlue

Fri, 21 Aug - Fri, 4 Sep

06:10 - 20:45PWM Portland-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 - 00:25LHR London Heathrow-PWM Portland

17h 30m1 stop New York John F Kennedy Intl

£663JetBlue

Fri, 21 Aug - Sat, 5 Sep

06:00 - 05:55PWM Portland-LHR London Heathrow

18h 55m1 stop Newark

06:50 - 23:59LHR London Heathrow-PWM Portland

22h 09m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£685United Airlines

Sun, 23 Aug - Mon, 7 Sep

06:10 - 20:45PWM Portland-LHR London Heathrow

9h 35m1 stop New York John F Kennedy Intl

11:55 - 23:54LHR London Heathrow-PWM Portland

16h 59m1 stop New York John F Kennedy Intl

£685JetBlue

Fri, 21 Aug - Wed, 9 Sep

05:52 - 05:55PWM Portland-LHR London Heathrow

19h 03m2 stops Washington, D.C. Dulles Intl Newark

06:50 - 23:59LHR London Heathrow-PWM Portland

22h 09m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£688United Airlines

Sun, 23 Aug - Mon, 7 Sep

06:00 - 21:00PWM Portland-LHR London Heathrow

34h 00m2 stops Newark Halifax Intl

12:40 - 23:32LHR London Heathrow-PWM Portland

39h 52m2 stops Halifax Intl Newark

£689Air Canada

Thu, 20 Aug - Thu, 10 Sep

06:00 - 21:00PWM Portland-LHR London Heathrow

34h 00m2 stops Newark Halifax Intl

12:40 - 23:32LHR London Heathrow-PWM Portland

39h 52m2 stops Halifax Intl Newark

£689Air Canada

Sun, 23 Aug - Sat, 5 Sep

06:00 - 21:00PWM Portland-LHR London Heathrow

34h 00m2 stops Newark Halifax Intl

12:40 - 23:32LHR London Heathrow-PWM Portland

39h 52m2 stops Halifax Intl Newark

£689Air Canada

Sun, 23 Aug - Thu, 10 Sep

06:00 - 21:00PWM Portland-LHR London Heathrow

34h 00m2 stops Newark Halifax Intl

14:10 - 18:29LHR London Heathrow-PWM Portland

33h 19m2 stops Ottawa Newark

£689Air Canada

Thu, 20 Aug - Sat, 5 Sep

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Delta flights from Portland, Maine to London

Our best Delta deals on Portland, Maine to London flight tickets

Delta

10 Nov

PWM14:15Portland

13h 45m

1 stop

LHR09:00London Heathrow

24 Nov

LHR06:30London Heathrow

22h 03m

2 stops

PWM23:33Portland

£640

Delta

10 Nov

PWM16:03Portland

13h 27m

1 stop

LHR10:30London Heathrow

24 Nov

LHR10:00London Heathrow

18h 55m

2 stops

PWM23:55Portland

£640

Delta

10 Nov

PWM12:50Portland

17h 50m

2 stops

LHR11:40London Heathrow

17 Nov

LHR06:30London Heathrow

22h 25m

2 stops

PWM23:55Portland

£643

JetBlue flights from Portland, Maine to London

Our best JetBlue deals on Portland, Maine to London flight tickets

JetBlue

15 Sept

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

21 Sept

LHR08:15London Heathrow

20h 39m

1 stop

PWM23:54Portland

£652

JetBlue

21 Sept

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

26 Sept

LHR11:55London Heathrow

16h 59m

1 stop

PWM23:54Portland

£655

JetBlue

9 Oct

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

15 Oct

LHR11:55London Heathrow

16h 57m

1 stop

PWM23:52Portland

£655

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 8/2

11:17-09:10

1 stop16h 53m

London Heathrow

Wed 10/2

06:50-22:57

2 stops21h 07m

£557

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 8/2

15:15-12:00

2 stops15h 45m

London Heathrow

Wed 10/2

06:50-22:57

2 stops21h 07m

£560

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:15-09:00

1 stop13h 45m

London Heathrow

Tue 24/11

06:30-23:33

2 stops22h 03m

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

16:03-10:30

1 stop13h 27m

London Heathrow

Tue 24/11

10:00-23:55

2 stops18h 55m

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

16:03-10:30

1 stop13h 27m

London Heathrow

Tue 17/11

10:00-23:55

2 stops18h 55m

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:50-09:00

2 stops15h 10m

London Heathrow

Tue 24/11

10:00-23:33

2 stops18h 33m

£643

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:50-09:00

2 stops15h 10m

London Heathrow

Tue 17/11

08:40-23:55

2 stops20h 15m

£643

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 23/9

16:20-13:45

2 stops16h 25m

London Heathrow

Tue 6/10

09:55-00:10

2 stops19h 15m

£643

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:50-11:40

2 stops17h 50m

London Heathrow

Tue 17/11

06:30-23:55

2 stops22h 25m

£643

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 15/9

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 21/9

08:15-23:54

1 stop20h 39m

£652

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

Prices

Airlines

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

Prices are currently typical for flights on this route.

Typical prices usually range from £528 to £640.
The lowest price recently found on this route was £557.

What is the cheapest month to fly to London?

The cheapest month to fly to London from Portland, Maine is in January. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. The month of December is another great option to travel to London, with average flight prices from Portland, Maine averaging around £516.

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

You could potentially save up to 38% on your flight if you consider stops on a Portland, Maine to London flight.

When to book flights from Portland, Maine to London

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

Estimated return price

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

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

Best price found	£245
Fastest flight time	9h 45m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is £245. The best return flight deal from Portland, Maine to London found on momondo in the last 72 hours is £557.

The fastest flight from Portland, Maine to London takes 9h 45m

There are no direct flights from Portland, Maine to London. There are no popular flight routes from Portland, Maine to London.

Search flight deals

Frequently asked questions about flying from Portland, Maine to London

How far is Portland to London by plane?
A flight from Portland to London will travel around 3183.1 mi. Typically, this will take 9h 45m by plane in normal conditions.
When did momondo last update prices for flights from Portland Airport to London?
Prices for flights from Portland Airport to London refresh daily.
How old do you have to be to fly from Portland Airport to London?
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 Portland Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London 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.

Eastbourne

Wembley

Gatwick

Milton Keynes

Luton

Southend-on-Sea

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Guildford

Bedford

Harlow

Colchester

Chelmsford

Why use momondo?

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

It is quick and easy to find Portland to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Portland to London flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Portland and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Portland to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your London trip

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Cheap flights from Portland, Maine to London from £245

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to London departing on 11/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Portland, Maine to London

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Big names, great deals

Big names, great deals

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Delta flights from Portland, Maine to London

Our best Delta deals on Portland, Maine to London flight tickets

JetBlue flights from Portland, Maine to London

Our best JetBlue deals on Portland, Maine to London flight tickets

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Use the filters below to find and compare flights from Portland, Maine to London that are best for you.

See travel insights to London from

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

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

What is the cheapest month to fly to London?

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

What is the cheapest airline that flies from Portland to London?

Which airlines fly to London?

When to book flights from Portland, Maine to London

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Portland, Maine to London

Travelling to a place near London?

Why use momondo?

An easier way to manage your London 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favourite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

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