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?

Delta, KLM, and JetBlue 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.

£289 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 £656 to £540. The lowest price recently found on this route was £539.

1 adult

0 bags

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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.

14:51 - 10:20

PWM

LHR

14h 29m

1 stop

08:40 - 23:09

LHR

PWM

19h 29m

2 stops

£539Delta

Wed, 6 May - Mon, 11 May

12:46 - 08:50

PWM

LHR

15h 04m

2 stops

08:40 - 23:09

LHR

PWM

19h 29m

2 stops

£542Delta

Wed, 6 May - Mon, 11 May

14:38 - 10:20

PWM

LHR

14h 42m

1 stop

09:20 - 23:12

LHR

PWM

18h 52m

1 stop

£543KLM

Fri, 8 May - Wed, 13 May

14:51 - 08:50

PWM

LHR

12h 59m

1 stop

09:20 - 23:09

LHR

PWM

18h 49m

1 stop

£544KLM

Wed, 6 May - Mon, 11 May

13:35 - 13:15

PWM

LHR

18h 40m

1 stop

06:15 - 22:33

LHR

PWM

21h 18m

2 stops

£578Virgin Atlantic

Tue, 18 Aug - Tue, 1 Sep

14:05 - 07:15

PWM

LHR

12h 10m

1 stop

09:20 - 23:09

LHR

PWM

18h 49m

1 stop

£596Virgin Atlantic

Thu, 7 May - Sat, 30 May

09:52 - 10:00

PWM

LGW

19h 08m

1 stop

14:00 - 09:12

LGW

PWM

24h 12m

1 stop

£687Multiple Airlines

Fri, 22 May - Fri, 29 May

09:52 - 10:00

PWM

LGW

19h 08m

1 stop

14:00 - 16:16

LGW

PWM

31h 16m

2 stops

£702Multiple Airlines

Fri, 22 May - Fri, 29 May

07:20 - 09:55

PWM

LGW

45h 35m

2 stops

07:05 - 23:03

LGW

PWM

20h 58m

2 stops

£765Turkish Airlines

Wed, 6 May - Mon, 11 May

07:20 - 09:55

PWM

LGW

45h 35m

2 stops

07:05 - 23:03

LGW

PWM

44h 58m

2 stops

£798Turkish Airlines

Wed, 6 May - Mon, 11 May

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KLM flights from Portland, Maine to London

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

KLM

6 May

PWM14:51Portland

12h 59m

1 stop

LHR08:50London Heathrow

11 May

LHR12:50London Heathrow

16h 53m

1 stop

PWM00:43Portland

£543

KLM

6 May

PWM14:51Portland

12h 59m

1 stop

LHR08:50London Heathrow

11 May

LHR09:20London Heathrow

18h 49m

1 stop

PWM23:09Portland

£544

KLM

21 Jul

PWM12:42Portland

13h 28m

1 stop

LHR07:10London Heathrow

30 Jul

LHR11:45London Heathrow

18h 14m

1 stop

PWM00:59Portland

£621

United Airlines flights from Portland, Maine to London

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

United Airlines

1 May

PWM11:34Portland

16h 26m

1 stop

LHR09:00London Heathrow

5 May

LHR06:50London Heathrow

16h 33m

2 stops

PWM18:23Portland

£684

United Airlines

1 May

PWM14:08Portland

15h 32m

1 stop

LHR10:40London Heathrow

5 May

LHR06:50London Heathrow

16h 33m

2 stops

PWM18:23Portland

£685

United Airlines

8 May

PWM15:39Portland

14h 01m

2 stops

LHR10:40London Heathrow

13 May

LHR13:50London Heathrow

14h 39m

2 stops

PWM23:29Portland

£689

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

14:51-10:20

1 stop14h 29m

London Heathrow

Mon 11/5

08:40-23:09

2 stops19h 29m

£539

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

12:46-08:50

2 stops15h 04m

London Heathrow

Mon 11/5

08:40-23:09

2 stops19h 29m

£542

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/5

14:38-10:20

1 stop14h 42m

London Heathrow

Wed 13/5

09:20-23:12

1 stop18h 52m

£543

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

14:51-08:50

1 stop12h 59m

London Heathrow

Mon 11/5

09:20-23:09

1 stop18h 49m

£544

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 18/8

13:35-13:15

1 stop18h 40m

London Heathrow

Tue 1/9

06:15-22:33

2 stops21h 18m

£578

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 7/5

14:05-07:15

1 stop12h 10m

London Heathrow

Sat 30/5

09:20-23:09

1 stop18h 49m

£596

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 22/5

09:52-10:00

1 stop19h 08m

London Gatwick

Fri 29/5

14:00-09:12

1 stop24h 12m

£687

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 22/5

09:52-10:00

1 stop19h 08m

London Gatwick

Fri 29/5

14:00-16:16

2 stops31h 16m

£702

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 6/5

07:20-09:55

2 stops45h 35m

London Gatwick

Mon 11/5

07:05-23:03

2 stops20h 58m

£765

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 6/5

07:20-09:55

2 stops45h 35m

London Gatwick

Mon 11/5

07:05-23:03

2 stops44h 58m

£798

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?

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 21m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 21m

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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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 21m 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

Slough

Maidstone

Wembley

Southend-on-Sea

Ipswich

Canterbury

Ilford

Guildford

Hayes

Dover

Chelmsford

Folkestone

Chichester

Bedford

Ramsgate

Harlow

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 £289

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 5/5. 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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KLM flights from Portland, Maine to London

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

United Airlines flights from Portland, Maine to London

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

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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?

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

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

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