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

United Airlines, Air Canada, and Turkish Airlines are the most popular carriers operating from Portland to London

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 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.

£237 Cheap Flights from Portland, Maine to London in 2026

Find the cheapest flights from Portland, Maine to London

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One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

08:49 - 09:10PWM Portland-LHR London Heathrow

19h 21m1 stop Newark

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

21h 31m2 stops Brussels Bruxelles-National Newark

£561United Airlines

Mon, 16 Nov - Wed, 18 Nov

15:41 - 10:05PWM Portland-LHR London Heathrow

13h 24m2 stops Newark Brussels Bruxelles-National

09:10 - 21:51LHR London Heathrow-PWM Portland

17h 41m2 stops Newark Chicago O'Hare Intl

£580United Airlines

Mon, 16 Nov - Wed, 18 Nov

06:28 - 06:20PWM Portland-LHR London Heathrow

18h 52m1 stop New York LaGuardia

11:45 - 23:18LHR London Heathrow-PWM Portland

40h 33m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£583Delta

Thu, 8 Oct - Mon, 12 Oct

17:09 - 10:00PWM Portland-LGW London Gatwick

35h 51m2 stops Raleigh-Durham Orlando

10:10 - 09:08LGW London Gatwick-PWM Portland

26h 58m1 stop Orlando

£593Multiple Airlines

Tue, 20 Oct - Tue, 27 Oct

07:00 - 10:00PWM Portland-LGW London Gatwick

22h 00m2 stops Cincinnati Cinci./N. Kentucky Orlando

12:35 - 09:08LGW London Gatwick-PWM Portland

24h 33m1 stop Orlando

£634Multiple Airlines

Mon, 19 Oct - Sun, 25 Oct

06:00 - 21:25PWM Portland-LHR London Heathrow

10h 25m1 stop Newark

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

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

£634United Airlines

Tue, 20 Oct - Tue, 27 Oct

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

£640United Airlines

Tue, 10 Nov - Tue, 17 Nov

14:05 - 06:40PWM Portland-LHR London Heathrow

11h 35m1 stop Washington, D.C. Dulles Intl

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

17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£640United Airlines

Tue, 10 Nov - Tue, 24 Nov

15:41 - 10:50PWM Portland-LHR London Heathrow

14h 09m2 stops Newark Washington, D.C. Dulles Intl

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

17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£643United Airlines

Tue, 10 Nov - Tue, 24 Nov

06:00 - 21:00PWM Portland-LHR London Heathrow

34h 00m2 stops Newark Halifax Intl

09:00 - 23:21LHR London Heathrow-PWM Portland

42h 21m2 stops Halifax Intl Newark

£644Air Canada

Sat, 10 Oct - Wed, 28 Oct

Cheap last-minute flights

Enter your travel dates to find the best prices.

16:57 - 11:55PWM Portland-LHR London Heathrow

13h 58m1 stop Chicago O'Hare Intl

06:50 - 18:29LHR London Heathrow-PWM Portland

16h 39m2 stops Brussels Bruxelles-National Newark

£684United Airlines

Mon, 14 Sep - Mon, 21 Sep

09:49 - 05:55PWM Portland-LHR London Heathrow

15h 06m2 stops Washington, D.C. Dulles Intl Newark

06:50 - 18:29LHR London Heathrow-PWM Portland

16h 39m2 stops Brussels Bruxelles-National Newark

£688United Airlines

Mon, 14 Sep - Mon, 21 Sep

16:57 - 11:55PWM Portland-LHR London Heathrow

13h 58m1 stop Chicago O'Hare Intl

15:20 - 23:32LHR London Heathrow-PWM Portland

13h 12m1 stop Newark

£706United Airlines

Mon, 14 Sep - Mon, 21 Sep

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

22h 54m2 stops Newark Montreal Pierre Elliott Trudeau Intl

14:05 - 13:55LHR London Heathrow-PWM Portland

28h 50m2 stops Montreal Pierre Elliott Trudeau Intl Newark

£1,654Air Canada

Mon, 14 Sep - Tue, 22 Sep

16:20 - 10:45PWM Portland-LHR London Heathrow

13h 25m2 stops New York John F Kennedy Intl Amsterdam Schiphol

12:50 - 23:56LHR London Heathrow-PWM Portland

16h 06m1 stop New York John F Kennedy Intl

£1,806Delta

Mon, 14 Sep - Tue, 22 Sep

08:00 - 11:55PWM Portland-LHR London Heathrow

22h 55m1 stop Chicago O'Hare Intl

10:25 - 18:29LHR London Heathrow-PWM Portland

13h 04m1 stop Newark

£1,854Austrian Airlines

Mon, 14 Sep - Tue, 22 Sep

10:50 - 08:35PWM Portland-LHR London Heathrow

16h 45m3 stops Newark Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

14:05 - 23:32LHR London Heathrow-PWM Portland

14h 27m2 stops Montreal Pierre Elliott Trudeau Intl Newark

£2,231Multiple Airlines

Mon, 14 Sep - Tue, 22 Sep

10:50 - 08:35PWM Portland-LHR London Heathrow

16h 45m3 stops Newark Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl

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

20h 02m3 stops Toronto Pearson Intl Ottawa Newark

£2,235Air Canada

Mon, 14 Sep - Tue, 22 Sep

06:00 - 08:40PWM Portland-LCY London City

21h 40m2 stops New York John F Kennedy Intl Frankfurt am Main

09:15 - 23:54LCY London City-PWM Portland

19h 39m2 stops Frankfurt am Main New York John F Kennedy Intl

£2,247Multiple Airlines

Mon, 14 Sep - Tue, 22 Sep

06:00 - 09:00PWM Portland-LGW London Gatwick

22h 00m2 stops New York John F Kennedy Intl Frankfurt am Main

19:45 - 23:54LGW London Gatwick-PWM Portland

33h 09m2 stops Frankfurt am Main New York John F Kennedy Intl

£2,442Multiple Airlines

Mon, 14 Sep - Tue, 22 Sep

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Air Canada flights from Portland, Maine to London

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

Air Canada

10 Oct

PWM06:00Portland

34h 00m

2 stops

LHR21:00London Heathrow

28 Oct

LHR09:00London Heathrow

42h 21m

2 stops

PWM23:21Portland

£644

Air Canada

14 Oct

PWM06:00Portland

21h 35m

2 stops

LHR08:35London Heathrow

23 Oct

LHR09:30London Heathrow

33h 21m

2 stops

PWM13:51Portland

£647

Air Canada

6 Oct

PWM09:10Portland

16h 20m

3 stops

LHR06:30London Heathrow

13 Oct

LHR06:50London Heathrow

18h 32m

3 stops

PWM20:22Portland

£654

JetBlue flights from Portland, Maine to London

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

JetBlue

10 Nov

PWM06:30Portland

10h 10m

1 stop

LHR21:40London Heathrow

17 Nov

LHR12:20London Heathrow

16h 23m

1 stop

PWM23:43Portland

£648

JetBlue

20 Oct

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

27 Oct

LHR12:20London Heathrow

15h 23m

1 stop

PWM23:43Portland

£651

JetBlue

16 Nov

PWM06:30Portland

10h 10m

1 stop

LHR21:40London Heathrow

18 Nov

LHR12:20London Heathrow

16h 23m

1 stop

PWM23:43Portland

£662

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

08:49-09:10

1 stop19h 21m

London Heathrow

Wed 18/11

06:50-23:21

2 stops21h 31m

£561

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

15:41-10:05

2 stops13h 24m

London Heathrow

Wed 18/11

09:10-21:51

2 stops17h 41m

£580

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Thu 8/10

06:28-06:20

1 stop18h 52m

London Heathrow

Mon 12/10

11:45-23:18

2 stops40h 33m

£583

PortlandLondon

PWM Portland - LGW London Gatwick

PWMLGW

Portland

Tue 20/10

17:09-10:00

2 stops35h 51m

London Gatwick

Tue 27/10

10:10-09:08

1 stop26h 58m

£593

PortlandLondon

PWM Portland - LGW London Gatwick

PWMLGW

Portland

Mon 19/10

07:00-10:00

2 stops22h 00m

London Gatwick

Sun 25/10

12:35-09:08

1 stop24h 33m

£634

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 20/10

06:00-21:25

1 stop10h 25m

London Heathrow

Tue 27/10

06:50-19:02

2 stops16h 12m

£634

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

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-06:40

1 stop11h 35m

London Heathrow

Tue 24/11

06:50-19:02

2 stops17h 12m

£640

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-10:50

2 stops14h 09m

London Heathrow

Tue 24/11

06:50-19:02

2 stops17h 12m

£643

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Sat 10/10

06:00-21:00

2 stops34h 00m

London Heathrow

Wed 28/10

09:00-23:21

2 stops42h 21m

£644

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 December is another great option to travel to London, with average flight prices from Portland, Maine averaging around £516.

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	£237
Fastest flight time	9h 40m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is £237. The best return flight deal from Portland, Maine to London found on momondo in the last 72 hours is £561.

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

Bedford

Guildford

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 £237

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 22/11. 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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Air Canada flights from Portland, Maine to London

Our best Air Canada 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

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

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.

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