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

JetBlue, Air Canada, and United 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 7 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.

£241 Cheap Flights from Portland, Maine to London in 2026/27

Find the cheapest flights from Portland, Maine to London

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One-way

Cheap return flights

Enter your travel dates to find the best prices.

15:41 - 11:15PWM Portland-LHR London Heathrow

14h 34m2 stops Newark Zurich

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

43h 21m2 stops Halifax Intl Newark

£553United Airlines

Mon, 16 Nov - Wed, 18 Nov

14:05 - 07:50PWM Portland-LHR London Heathrow

12h 45m1 stop Atlanta Hartsfield-Jackson

06:30 - 00:19LHR London Heathrow-PWM Portland

22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£554Delta

Tue, 10 Nov - Tue, 17 Nov

14:05 - 07:50PWM Portland-LHR London Heathrow

12h 45m1 stop Atlanta Hartsfield-Jackson

06:30 - 00:19LHR London Heathrow-PWM Portland

22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£555Delta

Tue, 10 Nov - Tue, 17 Nov

12:45 - 11:40PWM Portland-LHR London Heathrow

17h 55m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

06:30 - 00:19LHR London Heathrow-PWM Portland

22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£558Delta

Tue, 10 Nov - Tue, 17 Nov

17:08 - 07:55PWM Portland-LHR London Heathrow

33h 47m1 stop Chicago O'Hare Intl

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

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

£559United Airlines

Mon, 9 Nov - Thu, 12 Nov

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

13h 55m1 stop Atlanta Hartsfield-Jackson

15:50 - 00:19LHR London Heathrow-PWM Portland

13h 29m1 stop New York John F Kennedy Intl

£560Multiple Airlines

Tue, 10 Nov - Tue, 17 Nov

14:35 - 06:20PWM Portland-LHR London Heathrow

10h 45m1 stop New York John F Kennedy Intl

10:00 - 23:49LHR London Heathrow-PWM Portland

18h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£563Delta

Wed, 24 Feb - Wed, 3 Mar

12:50 - 07:50PWM Portland-LHR London Heathrow

14h 00m2 stops Detroit Metropolitan Wayne County Atlanta Hartsfield-Jackson

08:40 - 22:23LHR London Heathrow-PWM Portland

18h 43m2 stops Amsterdam Schiphol Atlanta Hartsfield-Jackson

£566Delta

Wed, 24 Feb - Wed, 3 Mar

14:35 - 08:05PWM Portland-LHR London Heathrow

12h 30m1 stop New York John F Kennedy Intl

15:50 - 23:49LHR London Heathrow-PWM Portland

12h 59m1 stop New York John F Kennedy Intl

£570KLM

Wed, 24 Feb - Wed, 3 Mar

15:41 - 11:15PWM Portland-LHR London Heathrow

14h 34m2 stops Newark Zurich

08:00 - 19:02LHR London Heathrow-PWM Portland

16h 02m2 stops Newark Washington, D.C. Dulles Intl

£574United Airlines

Mon, 16 Nov - Wed, 18 Nov

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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

4 Nov

PWM08:49Portland

31h 11m

2 stops

LHR21:00London Heathrow

11 Nov

LHR09:00London Heathrow

43h 21m

2 stops

PWM23:21Portland

£655

Air Canada

9 Nov

PWM08:49Portland

16h 41m

3 stops

LHR06:30London Heathrow

12 Nov

LHR06:00London Heathrow

22h 21m

3 stops

PWM23:21Portland

£663

Air Canada

10 Nov

PWM08:49Portland

16h 41m

3 stops

LHR06:30London Heathrow

17 Nov

LHR06:00London Heathrow

22h 21m

3 stops

PWM23:21Portland

£664

Delta flights from Portland, Maine to London

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

Delta

10 Nov

PWM14:05Portland

12h 45m

1 stop

LHR07:50London Heathrow

17 Nov

LHR06:30London Heathrow

22h 49m

2 stops

PWM00:19Portland

£554

Delta

7 Oct

PWM06:04Portland

19h 16m

1 stop

LHR06:20London Heathrow

14 Oct

LHR08:40London Heathrow

20h 30m

2 stops

PWM00:10Portland

£555

Delta

7 Oct

PWM16:47Portland

14h 18m

2 stops

LHR12:05London Heathrow

14 Oct

LHR11:45London Heathrow

17h 25m

2 stops

PWM00:10Portland

£558

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

15:41-11:15

2 stops14h 34m

London Heathrow

Wed 18/11

09:00-23:21

2 stops43h 21m

£553

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-07:50

1 stop12h 45m

London Heathrow

Tue 17/11

06:30-00:19

2 stops22h 49m

£554

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-07:50

1 stop12h 45m

London Heathrow

Tue 17/11

06:30-00:19

2 stops22h 49m

£555

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:45-11:40

2 stops17h 55m

London Heathrow

Tue 17/11

06:30-00:19

2 stops22h 49m

£558

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 9/11

17:08-07:55

1 stop33h 47m

London Heathrow

Thu 12/11

06:50-19:02

2 stops17h 12m

£559

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-09:00

1 stop13h 55m

London Heathrow

Tue 17/11

15:50-00:19

1 stop13h 29m

£560

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 24/2

14:35-06:20

1 stop10h 45m

London Heathrow

Wed 3/3

10:00-23:49

2 stops18h 49m

£563

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 24/2

12:50-07:50

2 stops14h 00m

London Heathrow

Wed 3/3

08:40-22:23

2 stops18h 43m

£566

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 24/2

14:35-08:05

1 stop12h 30m

London Heathrow

Wed 3/3

15:50-23:49

1 stop12h 59m

£570

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

15:41-11:15

2 stops14h 34m

London Heathrow

Wed 18/11

08:00-19:02

2 stops16h 02m

£574

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 £526.

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	£241
Fastest flight time	10h 15m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is £241. The best return flight deal from Portland, Maine to London found on momondo in the last 72 hours is £553.

The fastest flight from Portland, Maine to London takes 10h 15m

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 15m 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 £241

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 2/10. 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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Air Canada flights from Portland, Maine to London

Our best Air Canada 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 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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