What is the cheapest airline that flies from Portland to London?

JetBlue, Air France, and United Airlines are the most popular carriers operating from Portland to London

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 43% 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.

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

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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.

08:47 - 07:55

PWM

LHR

18h 08m

1 stop

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£552United Airlines

Sun, 15 Nov - Tue, 17 Nov

14:23 - 09:10

PWM

LHR

13h 47m

2 stops

06:50 - 18:21

LHR

PWM

16h 31m

2 stops

£555United Airlines

Sun, 15 Nov - Tue, 17 Nov

19:43 - 07:10

PWM

LHR

30h 27m

2 stops

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£558United Airlines

Tue, 10 Nov - Fri, 13 Nov

09:52 - 10:00

PWM

LGW

19h 08m

1 stop

14:00 - 10:27

LGW

PWM

25h 27m

1 stop

£583Multiple Airlines

Fri, 21 Aug - Fri, 28 Aug

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

11:55 - 00:25

LHR

PWM

17h 30m

1 stop

£593JetBlue

Sun, 23 Aug - Thu, 3 Sep

06:10 - 20:45

PWM

LHR

9h 35m

1 stop

11:55 - 00:25

LHR

PWM

17h 30m

1 stop

£617JetBlue

Fri, 21 Aug - Fri, 28 Aug

18:29 - 10:00

PWM

LGW

34h 31m

2 stops

14:00 - 10:27

LGW

PWM

25h 27m

1 stop

£623Multiple Airlines

Fri, 21 Aug - Fri, 28 Aug

12:47 - 07:10

PWM

LHR

13h 23m

1 stop

11:45 - 00:59

LHR

PWM

18h 14m

2 stops

£641KLM

Wed, 12 Aug - Wed, 19 Aug

11:50 - 09:25

PWM

LGW

16h 35m

2 stops

10:25 - 00:59

LGW

PWM

19h 34m

2 stops

£655Delta

Thu, 13 Aug - Thu, 20 Aug

14:53 - 09:30

PWM

LCY

13h 37m

2 stops

10:00 - 23:13

LCY

PWM

18h 13m

2 stops

£714Delta

Mon, 24 Aug - Mon, 31 Aug

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Delta flights from Portland, Maine to London

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

Delta

10 Nov

PWM16:50Portland

10h 55m

1 stop

LHR08:45London Heathrow

17 Nov

LHR06:30London Heathrow

22h 19m

2 stops

PWM23:49Portland

£647

Delta

10 Nov

PWM12:50Portland

15h 10m

2 stops

LHR09:00London Heathrow

17 Nov

LHR06:30London Heathrow

22h 19m

2 stops

PWM23:49Portland

£650

Delta

12 Aug

PWM16:47Portland

15h 18m

2 stops

LHR13:05London Heathrow

19 Aug

LHR11:45London Heathrow

18h 14m

2 stops

PWM00:59Portland

£650

JetBlue flights from Portland, Maine to London

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

JetBlue

20 Aug

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

31 Aug

LHR08:15London Heathrow

33h 15m

1 stop

PWM12:30Portland

£612

JetBlue

21 Aug

PWM06:10Portland

9h 35m

1 stop

LHR20:45London Heathrow

28 Aug

LHR11:55London Heathrow

17h 30m

1 stop

PWM00:25Portland

£617

JetBlue

21 Oct

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

28 Oct

LHR07:25London Heathrow

20h 18m

1 stop

PWM23:43Portland

£627

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 15/11

08:47-07:55

1 stop18h 08m

London Heathrow

Tue 17/11

06:50-16:09

2 stops14h 19m

£552

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 15/11

14:23-09:10

2 stops13h 47m

London Heathrow

Tue 17/11

06:50-18:21

2 stops16h 31m

£555

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

19:43-07:10

2 stops30h 27m

London Heathrow

Fri 13/11

06:50-16:09

2 stops14h 19m

£558

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 21/8

09:52-10:00

1 stop19h 08m

London Gatwick

Fri 28/8

14:00-10:27

1 stop25h 27m

£583

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 23/8

06:00-20:45

1 stop9h 45m

London Heathrow

Thu 3/9

11:55-00:25

1 stop17h 30m

£593

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 21/8

06:10-20:45

1 stop9h 35m

London Heathrow

Fri 28/8

11:55-00:25

1 stop17h 30m

£617

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 21/8

18:29-10:00

2 stops34h 31m

London Gatwick

Fri 28/8

14:00-10:27

1 stop25h 27m

£623

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/8

12:47-07:10

1 stop13h 23m

London Heathrow

Wed 19/8

11:45-00:59

2 stops18h 14m

£641

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 13/8

11:50-09:25

2 stops16h 35m

London Gatwick

Thu 20/8

10:25-00:59

2 stops19h 34m

£655

PortlandLondon

PWM - LCY

PWMLCY

Portland

Mon 24/8

14:53-09:30

2 stops13h 37m

London City

Mon 31/8

10:00-23:13

2 stops18h 13m

£714

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 September is another great option to travel to London, with average flight prices from Portland, Maine averaging around £430.

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	9h 45m
Direct flights	None

The fastest flight from Portland, Maine to London takes 9h 45m

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 9h 45m 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

Wembley

Gatwick

Milton Keynes

Luton

Southend-on-Sea

Slough

Ipswich

Maidstone

Folkestone

Ilford

Canterbury

Guildford

Hastings

Hayes

Chichester

Bedford

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.

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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 13/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Delta flights from Portland, Maine to London

Our best Delta 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

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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