Which airlines fly to London?

British Airways, Virgin Atlantic and JetBlue 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 40% 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?

American Airlines, United Airlines, and Air Canada 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.

£244 Cheap Flights from Portland, Maine 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 £657 to £541. The lowest price recently found on this route was £643.

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:00 - 09:00

PWM

LHR

23h 00m

1 stop

06:30 - 22:23

LHR

PWM

20h 53m

2 stops

£643Virgin Atlantic

Tue, 27 Oct - Mon, 2 Nov

14:35 - 06:20

PWM

LHR

10h 45m

1 stop

08:40 - 23:59

LHR

PWM

20h 19m

2 stops

£644Delta

Sun, 6 Sep - Sun, 13 Sep

16:50 - 12:05

PWM

LHR

14h 15m

2 stops

11:45 - 23:49

LHR

PWM

17h 04m

2 stops

£647Delta

Mon, 5 Oct - Fri, 16 Oct

14:35 - 10:30

PWM

LHR

14h 55m

2 stops

11:45 - 23:59

LHR

PWM

17h 14m

2 stops

£648Delta

Sun, 6 Sep - Sun, 13 Sep

14:53 - 12:05

PWM

LHR

16h 12m

1 stop

08:55 - 00:59

LHR

PWM

21h 04m

2 stops

£648Delta

Wed, 12 Aug - Thu, 20 Aug

13:35 - 07:50

PWM

LHR

14h 15m

1 stop

16:10 - 23:49

LHR

PWM

12h 39m

1 stop

£665KLM

Tue, 27 Oct - Mon, 2 Nov

06:00 - 06:30

PWM

LHR

19h 30m

2 stops

14:05 - 18:29

LHR

PWM

33h 24m

2 stops

£668Air Canada

Tue, 18 Aug - Fri, 21 Aug

20:41 - 10:00

PWM

LGW

32h 19m

2 stops

14:00 - 09:08

LGW

PWM

24h 08m

1 stop

£771Multiple Airlines

Sun, 6 Sep - Sun, 13 Sep

06:00 - 22:25

PWM

LGW

35h 25m

2 stops

10:50 - 23:52

LGW

PWM

42h 02m

2 stops

£795Turkish Airlines

Sun, 6 Sep - Sun, 13 Sep

11:07 - 10:00

PWM

LGW

17h 53m

1 stop

14:00 - 09:12

LGW

PWM

24h 12m

1 stop

£807Multiple Airlines

Wed, 12 Aug - Thu, 20 Aug

Air Canada flights from Portland, Maine to London

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

Air Canada

18 Aug

PWM06:00Portland

19h 30m

2 stops

LHR06:30London Heathrow

21 Aug

LHR14:05London Heathrow

33h 24m

2 stops

PWM18:29Portland

£668

Air Canada

27 Oct

PWM11:17Portland

17h 13m

3 stops

LHR08:30London Heathrow

2 Nov

LHR09:00London Heathrow

18h 57m

3 stops

PWM22:57Portland

£738

Air Canada

24 Jul

PWM06:00Portland

19h 30m

2 stops

LHR06:30London Heathrow

31 Jul

LHR12:40London Heathrow

49h 31m

2 stops

PWM09:11Portland

£792

Scandinavian Airlines flights from Portland, Maine to London

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

Scandinavian Airlines

18 Aug

PWM06:00Portland

29h 00m

2 stops

LHR16:00London Heathrow

21 Aug

LHR07:05London Heathrow

22h 54m

3 stops

PWM00:59Portland

£745

Scandinavian Airlines

27 Oct

PWM10:00Portland

19h 20m

3 stops

LHR09:20London Heathrow

2 Nov

LHR06:40London Heathrow

22h 09m

2 stops

PWM23:49Portland

£767

Scandinavian Airlines

3 Sept

PWM06:30Portland

28h 30m

2 stops

LHR16:00London Heathrow

7 Sept

LHR07:05London Heathrow

21h 54m

3 stops

PWM23:59Portland

£804

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 27/10

06:00-09:00

1 stop23h 00m

London Heathrow

Mon 2/11

06:30-22:23

2 stops20h 53m

£643

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/9

14:35-06:20

1 stop10h 45m

London Heathrow

Sun 13/9

08:40-23:59

2 stops20h 19m

£644

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/10

16:50-12:05

2 stops14h 15m

London Heathrow

Fri 16/10

11:45-23:49

2 stops17h 04m

£647

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 6/9

14:35-10:30

2 stops14h 55m

London Heathrow

Sun 13/9

11:45-23:59

2 stops17h 14m

£648

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/8

14:53-12:05

1 stop16h 12m

London Heathrow

Thu 20/8

08:55-00:59

2 stops21h 04m

£648

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 27/10

13:35-07:50

1 stop14h 15m

London Heathrow

Mon 2/11

16:10-23:49

1 stop12h 39m

£665

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 18/8

06:00-06:30

2 stops19h 30m

London Heathrow

Fri 21/8

14:05-18:29

2 stops33h 24m

£668

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sun 6/9

20:41-10:00

2 stops32h 19m

London Gatwick

Sun 13/9

14:00-09:08

1 stop24h 08m

£771

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sun 6/9

06:00-22:25

2 stops35h 25m

London Gatwick

Sun 13/9

10:50-23:52

2 stops42h 02m

£795

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 12/8

11:07-10:00

1 stop17h 53m

London Gatwick

Thu 20/8

14:00-09:12

1 stop24h 12m

£807

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 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 October is another great option to travel to London, with average flight prices from Portland, Maine averaging around £443.

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

You could potentially save up to 26% 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

Fastest flight time	10h 25m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 25m

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 10h 25m 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

Wembley

Slough

Maidstone

Ipswich

Southend-on-Sea

Canterbury

Ilford

Hayes

Guildford

Folkestone

Chelmsford

Dover

Bedford

Chichester

Harlow

Colchester

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.

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Cheap flights from Portland, Maine to London from £244

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 17/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

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Air Canada flights from Portland, Maine to London

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

Scandinavian Airlines flights from Portland, Maine to London

Our best Scandinavian Airlines 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 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

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

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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