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, Delta, and United Airlines 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.

£236 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.

15:41 - 10:25PWM Portland-LHR London Heathrow

13h 44m1 stop Newark

06:50 - 23:21LHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

£640United Airlines

Tue, 10 Nov - Tue, 17 Nov

14:05 - 06:40PWM Portland-LHR London Heathrow

11h 35m1 stop Washington, D.C. Dulles Intl

06:50 - 19:02LHR London Heathrow-PWM Portland

17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£641United Airlines

Tue, 10 Nov - Tue, 24 Nov

15:41 - 10:50PWM Portland-LHR London Heathrow

14h 09m2 stops Newark Washington, D.C. Dulles Intl

06:50 - 19:02LHR London Heathrow-PWM Portland

17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£644United Airlines

Tue, 10 Nov - Tue, 24 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

£645JetBlue

Sun, 27 Sep - Sun, 4 Oct

15:41 - 10:15PWM Portland-LHR London Heathrow

13h 34m2 stops Newark Brussels Bruxelles-National

13:50 - 23:28LHR London Heathrow-PWM Portland

14h 38m2 stops Zurich Newark

£647United Airlines

Tue, 13 Oct - Tue, 20 Oct

05:50 - 07:10PWM Portland-LHR London Heathrow

20h 20m2 stops Newark Montreal Pierre Elliott Trudeau Intl

09:00 - 23:21LHR London Heathrow-PWM Portland

43h 21m2 stops Halifax Intl Newark

£648Air Canada

Tue, 10 Nov - Tue, 24 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

£649JetBlue

Thu, 24 Sep - Sun, 27 Sep

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

£650JetBlue

Thu, 8 Oct - Mon, 12 Oct

06:00 - 21:35PWM Portland-LHR London Heathrow

10h 35m1 stop Newark

17:55 - 18:12LHR London Heathrow-PWM Portland

29h 17m2 stops Brussels Bruxelles-National Newark

£650United Airlines

Mon, 12 Oct - Mon, 19 Oct

06:30 - 09:30PWM Portland-LHR London Heathrow

22h 00m1 stop New York John F Kennedy Intl

12:20 - 23:43LHR London Heathrow-PWM Portland

16h 23m1 stop New York John F Kennedy Intl

£652JetBlue

Sun, 15 Nov - Wed, 18 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

12:47 - 10:30PWM Portland-LHR London Heathrow

16h 43m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

09:55 - 23:29LHR London Heathrow-PWM Portland

18h 34m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£688Delta

Wed, 2 Sep - Wed, 9 Sep

06:00 - 09:30PWM Portland-LHR London Heathrow

22h 30m1 stop New York John F Kennedy Intl

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

20h 39m1 stop New York John F Kennedy Intl

£689JetBlue

Sun, 6 Sep - Thu, 10 Sep

14:53 - 09:25PWM Portland-LGW London Gatwick

13h 32m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

10:25 - 23:29LGW London Gatwick-PWM Portland

18h 04m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

£693Delta

Wed, 2 Sep - Wed, 9 Sep

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

34h 00m2 stops Newark Halifax Intl

09:30 - 18:29LHR London Heathrow-PWM Portland

13h 59m2 stops Montreal Pierre Elliott Trudeau Intl Newark

£700Air Canada

Thu, 3 Sep - Wed, 9 Sep

14:53 - 06:20PWM Portland-LHR London Heathrow

10h 27m1 stop New York John F Kennedy Intl

08:40 - 23:56LHR London Heathrow-PWM Portland

20h 16m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£761Delta

Thu, 3 Sep - Wed, 9 Sep

14:53 - 09:25PWM Portland-LGW London Gatwick

13h 32m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

10:25 - 23:29LGW London Gatwick-PWM Portland

18h 04m2 stops Paris Charles de Gaulle Atlanta Hartsfield-Jackson

£805Delta

Thu, 3 Sep - Wed, 9 Sep

06:00 - 20:10PWM Portland-LHR London Heathrow

9h 10m1 stop New York John F Kennedy Intl

09:55 - 23:29LHR London Heathrow-PWM Portland

18h 34m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£836Delta

Sun, 6 Sep - Thu, 10 Sep

16:47 - 13:45PWM Portland-LHR London Heathrow

15h 58m2 stops Detroit Metropolitan Wayne County Paris Charles de Gaulle

09:55 - 23:56LHR London Heathrow-PWM Portland

19h 01m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£839Delta

Sun, 6 Sep - Thu, 10 Sep

11:50 - 09:25PWM Portland-LGW London Gatwick

16h 35m2 stops Minneapolis St Paul Paris Charles de Gaulle

10:25 - 23:56LGW London Gatwick-PWM Portland

18h 31m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£844Delta

Sun, 6 Sep - Thu, 10 Sep

19:35 - 10:40PWM Portland-LHR London Heathrow

10h 05m1 stop Washington, D.C. Dulles Intl

12:15 - 19:24LHR London Heathrow-PWM Portland

12h 09m1 stop Washington, D.C. Dulles Intl

£850United Airlines

Wed, 2 Sep - Wed, 9 Sep

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United Airlines flights from Portland, Maine to London

Our best United Airlines deals on Portland, Maine to London flight tickets

United Airlines

10 Nov

PWM15:41Portland

13h 44m

1 stop

LHR10:25London Heathrow

17 Nov

LHR06:50London Heathrow

21h 31m

2 stops

PWM23:21Portland

£640

United Airlines

10 Nov

PWM14:05Portland

11h 35m

1 stop

LHR06:40London Heathrow

24 Nov

LHR06:50London Heathrow

17h 12m

2 stops

PWM19:02Portland

£641

United Airlines

10 Nov

PWM15:41Portland

14h 09m

2 stops

LHR10:50London Heathrow

24 Nov

LHR06:50London Heathrow

17h 12m

2 stops

PWM19:02Portland

£644

JetBlue flights from Portland, Maine to London

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

JetBlue

27 Sept

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

4 Oct

LHR08:15London Heathrow

20h 39m

1 stop

PWM23:54Portland

£645

JetBlue

8 Oct

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

12 Oct

LHR08:15London Heathrow

20h 39m

1 stop

PWM23:54Portland

£650

JetBlue

15 Nov

PWM06:30Portland

22h 00m

1 stop

LHR09:30London Heathrow

18 Nov

LHR12:20London Heathrow

16h 23m

1 stop

PWM23:43Portland

£652

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-10:25

1 stop13h 44m

London Heathrow

Tue 17/11

06:50-23:21

2 stops21h 31m

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-06:40

1 stop11h 35m

London Heathrow

Tue 24/11

06:50-19:02

2 stops17h 12m

£641

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-10:50

2 stops14h 09m

London Heathrow

Tue 24/11

06:50-19:02

2 stops17h 12m

£644

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Sun 27/9

06:00-20:45

1 stop9h 45m

London Heathrow

Sun 4/10

08:15-23:54

1 stop20h 39m

£645

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 13/10

15:41-10:15

2 stops13h 34m

London Heathrow

Tue 20/10

13:50-23:28

2 stops14h 38m

£647

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

05:50-07:10

2 stops20h 20m

London Heathrow

Tue 24/11

09:00-23:21

2 stops43h 21m

£648

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Thu 24/9

06:00-20:45

1 stop9h 45m

London Heathrow

Sun 27/9

08:15-23:54

1 stop20h 39m

£649

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Thu 8/10

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 12/10

08:15-23:54

1 stop20h 39m

£650

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 12/10

06:00-21:35

1 stop10h 35m

London Heathrow

Mon 19/10

17:55-18:12

2 stops29h 17m

£650

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Sun 15/11

06:30-09:30

1 stop22h 00m

London Heathrow

Wed 18/11

12:20-23:43

1 stop16h 23m

£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 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	£236
Fastest flight time	9h 40m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is £236. The best return flight deal from Portland, Maine to London found on momondo in the last 72 hours is £640.

The fastest flight from Portland, Maine to London takes 9h 40m

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 40m 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

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Gatwick

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Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Bedford

Guildford

Colchester

Harlow

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 £236

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 8/10. 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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United Airlines flights from Portland, Maine to London

Our best United Airlines 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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How to get the cheapest flight ticket from Portland, Maine to 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.

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