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 9 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.

£252 Cheap Flights from Portland to London in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from £473 to £502. The lowest price recently found on this route was £455.

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

12:29 - 06:35

PWM

LHR

13h 06m

1 stop

07:50 - 18:11

LHR

PWM

15h 21m

2 stops

£455American Airlines

Fri, 27 Feb - Tue, 3 Mar

14:35 - 10:15

PWM

LHR

14h 40m

1 stop

11:45 - 23:59

LHR

PWM

16h 14m

2 stops

£460Delta

Mon, 2 Mar - Mon, 9 Mar

06:30 - 08:00

PWM

LHR

20h 30m

2 stops

06:30 - 23:59

LHR

PWM

21h 29m

2 stops

£463Delta

Mon, 2 Mar - Mon, 9 Mar

14:30 - 08:50

PWM

LHR

13h 20m

1 stop

09:55 - 00:46

LHR

PWM

19h 51m

2 stops

£470Delta

Tue, 31 Mar - Tue, 14 Apr

12:29 - 06:35

PWM

LHR

13h 06m

1 stop

13:10 - 22:59

LHR

PWM

14h 49m

1 stop

£478Multiple Airlines

Fri, 27 Feb - Tue, 3 Mar

06:00 - 10:00

PWM

LHR

23h 00m

2 stops

17:50 - 18:23

LHR

PWM

29h 33m

2 stops

£480United Airlines

Wed, 6 May - Mon, 11 May

06:00 - 10:00

PWM

LHR

23h 00m

2 stops

17:50 - 18:23

LHR

PWM

29h 33m

2 stops

£482United Airlines

Wed, 6 May - Mon, 11 May

14:18 - 22:25

PWM

LGW

27h 07m

2 stops

17:35 - 23:36

LGW

PWM

35h 01m

2 stops

£605Turkish Airlines

Wed, 6 May - Mon, 11 May

14:18 - 16:40

PWM

LGW

21h 22m

2 stops

17:35 - 23:36

LGW

PWM

35h 01m

2 stops

£605Turkish Airlines

Wed, 6 May - Mon, 11 May

12:46 - 10:45

PWM

LGW

16h 59m

2 stops

14:00 - 09:07

LGW

PWM

24h 07m

1 stop

£855Multiple Airlines

Thu, 30 Apr - Sun, 3 May

American Airlines flights from Portland, Maine to London

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

American Airlines

27 Feb

PWM12:29Portland

13h 06m

1 stop

LHR06:35London Heathrow

3 Mar

LHR07:50London Heathrow

15h 21m

2 stops

PWM18:11Portland

£455

American Airlines

10 May

PWM10:43Portland

15h 07m

1 stop

LHR06:50London Heathrow

16 May

LHR13:45London Heathrow

14h 37m

1 stop

PWM23:22Portland

£530

Air Canada flights from Portland, Maine to London

Our best Air Canada deals on Portland, Maine to London flight tickets

Air Canada

27 Feb

PWM06:00Portland

24h 20m

2 stops

LHR11:20London Heathrow

3 Mar

LHR09:00London Heathrow

43h 20m

2 stops

PWM23:20Portland

£502

Air Canada

10 May

PWM06:00Portland

22h 35m

2 stops

LHR09:35London Heathrow

16 May

LHR09:30London Heathrow

18h 59m

2 stops

PWM23:29Portland

£536

Air Canada

10 May

PWM06:00Portland

21h 35m

2 stops

LHR08:35London Heathrow

16 May

LHR09:30London Heathrow

18h 59m

2 stops

PWM23:29Portland

£538

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/2

12:29-06:35

1 stop13h 06m

London Heathrow

Tue 3/3

07:50-18:11

2 stops15h 21m

£455

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 2/3

14:35-10:15

1 stop14h 40m

London Heathrow

Mon 9/3

11:45-23:59

2 stops16h 14m

£460

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 2/3

06:30-08:00

2 stops20h 30m

London Heathrow

Mon 9/3

06:30-23:59

2 stops21h 29m

£463

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 31/3

14:30-08:50

1 stop13h 20m

London Heathrow

Tue 14/4

09:55-00:46

2 stops19h 51m

£470

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/2

12:29-06:35

1 stop13h 06m

London Heathrow

Tue 3/3

13:10-22:59

1 stop14h 49m

£478

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

06:00-10:00

2 stops23h 00m

London Heathrow

Mon 11/5

17:50-18:23

2 stops29h 33m

£480

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

06:00-10:00

2 stops23h 00m

London Heathrow

Mon 11/5

17:50-18:23

2 stops29h 33m

£482

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 6/5

14:18-22:25

2 stops27h 07m

London Gatwick

Mon 11/5

17:35-23:36

2 stops35h 01m

£605

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 6/5

14:18-16:40

2 stops21h 22m

London Gatwick

Mon 11/5

17:35-23:36

2 stops35h 01m

£605

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 30/4

12:46-10:45

2 stops16h 59m

London Gatwick

Sun 3/5

14:00-09:07

1 stop24h 07m

£855

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?

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 £434, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Portland, Maine averaging around £488.

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 15m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 15m

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 10h 15m 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

Southend-on-Sea

Canterbury

Ipswich

Ilford

Guildford

Chelmsford

Hayes

Dover

Folkestone

Worthing

Colchester

Bedford

Ramsgate

Chichester

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.