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 44% of people opting to fly with this airline when travelling to London. Keep in mind that there are 7 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 and United Airlines 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.

£238 Cheap Flights from Portland, Maine to London in 2026

Find the cheapest flights from Portland, Maine to London

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One-way

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Cheap return flights

Enter your travel dates to find the best prices.

14:15 - 09:00PWM Portland-LHR London Heathrow

13h 45m1 stop Atlanta Hartsfield-Jackson

06:30 - 23:33LHR London Heathrow-PWM Portland

22h 03m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£636Delta

Tue, 10 Nov - Tue, 24 Nov

15:41 - 10:25PWM Portland-LHR London Heathrow

13h 44m1 stop Newark

06:50 - 23:21LHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

£636United Airlines

Tue, 10 Nov - Tue, 17 Nov

14:05 - 09:00PWM Portland-LHR London Heathrow

13h 55m1 stop Atlanta Hartsfield-Jackson

06:30 - 23:31LHR London Heathrow-PWM Portland

22h 01m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£636Delta

Tue, 10 Nov - Tue, 24 Nov

15:41 - 10:25PWM Portland-LHR London Heathrow

13h 44m1 stop Newark

06:50 - 23:21LHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

£636United Airlines

Tue, 10 Nov - Tue, 17 Nov

11:35 - 11:55PWM Portland-LHR London Heathrow

19h 20m1 stop Chicago O'Hare Intl

06:50 - 19:02LHR London Heathrow-PWM Portland

16h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£636United Airlines

Tue, 20 Oct - Wed, 28 Oct

06:00 - 20:40PWM Portland-LHR London Heathrow

9h 40m1 stop Newark

06:50 - 20:22LHR London Heathrow-PWM Portland

18h 32m2 stops Brussels Bruxelles-National Newark

£636United Airlines

Tue, 6 Oct - Tue, 13 Oct

10:50 - 05:55PWM Portland-LHR London Heathrow

14h 05m1 stop Newark

06:50 - 23:28LHR London Heathrow-PWM Portland

21h 38m2 stops Brussels Bruxelles-National Newark

£636United Airlines

Wed, 23 Sep - Wed, 30 Sep

12:50 - 09:00PWM Portland-LHR London Heathrow

15h 10m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

10:00 - 23:33LHR London Heathrow-PWM Portland

18h 33m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£639Delta

Tue, 10 Nov - Tue, 24 Nov

12:50 - 09:00PWM Portland-LHR London Heathrow

15h 10m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

08:40 - 23:55LHR London Heathrow-PWM Portland

20h 15m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£639Delta

Tue, 10 Nov - Tue, 17 Nov

16:15 - 13:45PWM Portland-LHR London Heathrow

16h 30m2 stops New York John F Kennedy Intl Paris Charles de Gaulle

09:55 - 23:35LHR London Heathrow-PWM Portland

18h 40m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£640Delta

Tue, 6 Oct - Tue, 13 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

06:00 - 20:10PWM Portland-LHR London Heathrow

9h 10m1 stop New York John F Kennedy Intl

09:55 - 23:13LHR London Heathrow-PWM Portland

18h 18m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£704Delta

Fri, 28 Aug - Fri, 4 Sep

06:00 - 20:10PWM Portland-LHR London Heathrow

9h 10m1 stop New York John F Kennedy Intl

11:20 - 00:59LHR London Heathrow-PWM Portland

18h 39m1 stop New York John F Kennedy Intl

£726Delta

Fri, 28 Aug - Fri, 4 Sep

05:15 - 06:45PWM Portland-LHR London Heathrow

20h 30m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl

07:25 - 23:59LHR London Heathrow-PWM Portland

21h 34m2 stops Munich Franz Josef Strauss Washington, D.C. Dulles Intl

£756United Airlines

Fri, 28 Aug - Fri, 4 Sep

11:50 - 09:25PWM Portland-LGW London Gatwick

16h 35m2 stops Minneapolis St Paul Paris Charles de Gaulle

10:25 - 00:59LGW London Gatwick-PWM Portland

19h 34m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£786Delta

Fri, 28 Aug - Fri, 4 Sep

09:49 - 10:15PWM Portland-LHR London Heathrow

19h 26m2 stops Washington, D.C. Dulles Intl Brussels Bruxelles-National

06:50 - 21:23LHR London Heathrow-PWM Portland

19h 33m2 stops Brussels Bruxelles-National Chicago O'Hare Intl

£796United Airlines

Mon, 31 Aug - Sun, 6 Sep

14:38 - 10:15PWM Portland-LHR London Heathrow

14h 37m2 stops Washington, D.C. Dulles Intl Brussels Bruxelles-National

07:45 - 23:32LHR London Heathrow-PWM Portland

20h 47m1 stop Newark

£818United Airlines

Mon, 31 Aug - Sun, 6 Sep

14:40 - 09:30PWM Portland-LHR London Heathrow

13h 50m1 stop New York John F Kennedy Intl

11:55 - 00:25LHR London Heathrow-PWM Portland

17h 30m1 stop New York John F Kennedy Intl

£966JetBlue

Mon, 31 Aug - Sun, 6 Sep

10:45 - 09:35PWM Portland-LHR London Heathrow

17h 50m3 stops Newark Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

08:30 - 23:32LHR London Heathrow-PWM Portland

20h 02m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Newark

£1,204Air Canada

Fri, 28 Aug - Fri, 4 Sep

06:00 - 09:20PWM Portland-LHR London Heathrow

22h 20m3 stops New York John F Kennedy Intl Boston Logan Intl Kastrup Copenhagen

07:05 - 00:59LHR London Heathrow-PWM Portland

22h 54m2 stops Oslo Gardermoen New York John F Kennedy Intl

£1,360Scandinavian Airlines

Fri, 28 Aug - Fri, 4 Sep

14:53 - 14:55PWM Portland-LGW London Gatwick

19h 02m2 stops New York John F Kennedy Intl Kastrup Copenhagen

14:00 - 10:27LGW London Gatwick-PWM Portland

25h 27m1 stop Orlando

£2,898Multiple Airlines

Fri, 28 Aug - Fri, 4 Sep

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United Airlines flights from Portland, Maine to London

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

United Airlines

10 Nov

PWM15:41Portland

13h 44m

1 stop

LHR10:25London Heathrow

17 Nov

LHR06:50London Heathrow

21h 31m

2 stops

PWM23:21Portland

£636

United Airlines

10 Nov

PWM15:41Portland

13h 44m

1 stop

LHR10:25London Heathrow

17 Nov

LHR06:50London Heathrow

21h 31m

2 stops

PWM23:21Portland

£636

United Airlines

10 Nov

PWM14:05Portland

14h 05m

2 stops

LHR09:10London Heathrow

24 Nov

LHR06:50London Heathrow

17h 12m

2 stops

PWM19:02Portland

£639

Delta flights from Portland, Maine to London

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

Delta

6 Oct

PWM16:15Portland

16h 30m

2 stops

LHR13:45London Heathrow

13 Oct

LHR09:55London Heathrow

18h 40m

2 stops

PWM23:35Portland

£640

Delta

23 Sept

PWM11:50Portland

14h 50m

2 stops

LHR07:40London Heathrow

30 Sept

LHR11:45London Heathrow

17h 11m

2 stops

PWM23:56Portland

£643

Delta

14 Oct

PWM16:47Portland

14h 18m

2 stops

LHR12:05London Heathrow

18 Oct

LHR11:45London Heathrow

17h 25m

2 stops

PWM00:10Portland

£662

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:15-09:00

1 stop13h 45m

London Heathrow

Tue 24/11

06:30-23:33

2 stops22h 03m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-10:25

1 stop13h 44m

London Heathrow

Tue 17/11

06:50-23:21

2 stops21h 31m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-09:00

1 stop13h 55m

London Heathrow

Tue 24/11

06:30-23:31

2 stops22h 01m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-10:25

1 stop13h 44m

London Heathrow

Tue 17/11

06:50-23:21

2 stops21h 31m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 20/10

11:35-11:55

1 stop19h 20m

London Heathrow

Wed 28/10

06:50-19:02

2 stops16h 12m

£636

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 6/10

06:00-20:40

1 stop9h 40m

London Heathrow

Tue 13/10

06:50-20:22

2 stops18h 32m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 23/9

10:50-05:55

1 stop14h 05m

London Heathrow

Wed 30/9

06:50-23:28

2 stops21h 38m

£636

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:50-09:00

2 stops15h 10m

London Heathrow

Tue 24/11

10:00-23:33

2 stops18h 33m

£639

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:50-09:00

2 stops15h 10m

London Heathrow

Tue 17/11

08:40-23:55

2 stops20h 15m

£639

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 6/10

16:15-13:45

2 stops16h 30m

London Heathrow

Tue 13/10

09:55-23:35

2 stops18h 40m

£640

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?

Prices are currently high for flights on this route.

Typical prices usually range from £537 to £599.
The lowest price recently found on this route was £636.

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 December is another great option to travel to London, with average flight prices from Portland, Maine averaging around £512.

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

You could potentially save up to 38% 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

Best price found	£238
Fastest flight time	9h 40m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is £238. The best return flight deal from Portland, Maine to London found on momondo in the last 72 hours is £636.

The fastest flight from Portland, Maine to London takes 9h 40m

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 9h 40m 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

Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Guildford

Bedford

Harlow

Colchester

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 £238

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 7/10. 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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United Airlines flights from Portland, Maine to London

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

Delta flights from Portland, Maine to London

Our best Delta 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

Best price found

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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