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 39% of people opting to fly with this airline when travelling to London. Keep in mind that there are 8 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.

£392 Cheap Flights from Portland to London in 2025/26

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Find the cheapest flights from Portland, Maine to London

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09:47 - 10:00

PWM

LGW

19h 13m1 stop

14:00 - 09:07

LGW

PWM

24h 07m1 stop

£392Multiple Airlines

Mon, 19 Jan - Thu, 29 Jan

09:47 - 10:00

PWM

LGW

19h 13m1 stop

14:00 - 16:26

LGW

PWM

31h 26m2 stops

£408Multiple Airlines

Mon, 19 Jan - Thu, 29 Jan

11:29 - 10:05

PWM

LGW

41h 36m2 stops

14:00 - 09:07

LGW

PWM

24h 07m1 stop

£425Multiple Airlines

Fri, 23 Jan - Thu, 29 Jan

09:47 - 10:00

PWM

LGW

19h 13m1 stop

14:00 - 10:22

LGW

PWM

25h 22m1 stop

£435Multiple Airlines

Mon, 19 Jan - Fri, 30 Jan

14:35 - 06:55

PWM

LHR

11h 20m1 stop

08:55 - 00:26

LHR

PWM

20h 31m2 stops

£448Delta

Wed, 7 Jan - Tue, 13 Jan

14:35 - 21:40

PWM

LHR

26h 05m2 stops

06:40 - 00:20

LHR

PWM

22h 40m2 stops

£449Scandinavian Airlines

Thu, 22 Jan - Tue, 27 Jan

06:16 - 09:20

PWM

LHR

22h 04m2 stops

06:40 - 00:20

LHR

PWM

22h 40m2 stops

£450Scandinavian Airlines

Thu, 5 Feb - Mon, 9 Feb

12:20 - 08:45

PWM

LHR

15h 25m1 stop

11:45 - 00:20

LHR

PWM

17h 35m2 stops

£451Delta

Wed, 21 Jan - Mon, 26 Jan

14:35 - 16:25

PWM

LHR

20h 50m3 stops

06:40 - 00:20

LHR

PWM

22h 40m2 stops

£452Scandinavian Airlines

Thu, 5 Feb - Mon, 9 Feb

06:00 - 10:15

PWM

LHR

23h 15m1 stop

12:40 - 23:22

LHR

PWM

15h 42m1 stop

£453Delta

Mon, 5 Jan - Thu, 15 Jan

United Airlines flights from Portland, Maine to London

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

United Airlines

31 Dec

PWM19:01Portland

10h 24m

1 stop

LHR10:25London Heathrow

7 Jan

LHR13:25London Heathrow

34h 25m

2 stops

PWM18:50Portland

£514

Find similar

United Airlines

23 Jan

PWM14:31Portland

11h 09m

1 stop

LHR06:40London Heathrow

27 Jan

LHR06:35London Heathrow

17h 17m

2 stops

PWM18:52Portland

£532

Find similar

United Airlines

23 Jan

PWM15:12Portland

12h 13m

1 stop

LHR08:25London Heathrow

27 Jan

LHR15:10London Heathrow

13h 20m

1 stop

PWM23:30Portland

£553

Find similar

American Airlines flights from Portland, Maine to London

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

American Airlines

10 May

PWM17:30Portland

13h 45m

1 stop

LHR12:15London Heathrow

16 May

LHR11:00London Heathrow

15h 24m

2 stops

PWM21:24Portland

£546

Find similar

American Airlines

22 May

PWM16:18Portland

9h 32m

1 stop

LHR06:50London Heathrow

31 May

LHR12:30London Heathrow

12h 45m

1 stop

PWM20:15Portland

£767

Find similar

American Airlines

7 Dec

PWM06:00Portland

20h 30m

2 stops

LGW07:30London Gatwick

14 Dec

LGW11:20London Gatwick

29h 51m

2 stops

PWM12:11Portland

£2,867

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 19/1

09:47-10:00

1 stop19h 13m

London Gatwick

Thu 29/1

14:00-09:07

1 stop24h 07m

£392

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 19/1

09:47-10:00

1 stop19h 13m

London Gatwick

Thu 29/1

14:00-16:26

2 stops31h 26m

£408

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 23/1

11:29-10:05

2 stops41h 36m

London Gatwick

Thu 29/1

14:00-09:07

1 stop24h 07m

£425

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 19/1

09:47-10:00

1 stop19h 13m

London Gatwick

Fri 30/1

14:00-10:22

1 stop25h 22m

£435

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 7/1

14:35-06:55

1 stop11h 20m

London Heathrow

Tue 13/1

08:55-00:26

2 stops20h 31m

£448

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 22/1

14:35-21:40

2 stops26h 05m

London Heathrow

Tue 27/1

06:40-00:20

2 stops22h 40m

£449

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 5/2

06:16-09:20

2 stops22h 04m

London Heathrow

Mon 9/2

06:40-00:20

2 stops22h 40m

£450

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 21/1

12:20-08:45

1 stop15h 25m

London Heathrow

Mon 26/1

11:45-00:20

2 stops17h 35m

£451

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 5/2

14:35-16:25

3 stops20h 50m

London Heathrow

Mon 9/2

06:40-00:20

2 stops22h 40m

£452

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/1

06:00-10:15

1 stop23h 15m

London Heathrow

Thu 15/1

12:40-23:22

1 stop15h 42m

£453

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 October. Flight prices, which tend to average around £464, 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 £524.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £530. Flights in the morning are often more expensive, with an average ticket price of £560.

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

Fastest flight time	10h 50m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 50m

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

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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 32m 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

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Hayes

Dover

Chelmsford

Colchester

Worthing

Bedford

Ramsgate

Hounslow

Stansted

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.