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 46% 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, Air Canada, and Scandinavian 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.

£258 Cheap Flights from Portland to London in 2025

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Last minute

Cheap return flights

14:17 - 09:30PWM-LHR

14h 13m1 stop

08:15 - 23:04LHR-PWM

19h 49m1 stop

£473JetBlue

Find Deal

Wed, 8 Oct - Wed, 15 Oct

14:17 - 09:30PWM-LHR

14h 13m1 stop

11:55 - 22:01LHR-PWM

15h 06m1 stop

£484JetBlue

Find Deal

Tue, 7 Oct - Tue, 14 Oct

06:31 - 09:35PWM-LHR

22h 04m2 stops

07:05 - 00:53LHR-PWM

22h 48m2 stops

£499Scandinavian Airlines

Find Deal

Sat, 6 Sep - Tue, 9 Sep

06:00 - 06:35PWM-LHR

19h 35m1 stop

07:50 - 18:13LHR-PWM

15h 23m2 stops

£530American Airlines

Find Deal

Wed, 12 Nov - Wed, 26 Nov

15:53 - 09:15PWM-LHR

12h 22m2 stops

07:50 - 18:13LHR-PWM

15h 23m2 stops

£534American Airlines

Find Deal

Wed, 12 Nov - Wed, 26 Nov

14:34 - 06:55PWM-LHR

11h 21m1 stop

08:45 - 23:59LHR-PWM

20h 14m2 stops

£540United Airlines

Find Deal

Tue, 7 Oct - Tue, 14 Oct

09:59 - 06:55PWM-LHR

15h 56m1 stop

12:05 - 14:33LHR-PWM

31h 28m2 stops

£542United Airlines

Find Deal

Wed, 8 Oct - Wed, 15 Oct

15:53 - 06:35PWM-LHR

9h 42m1 stop

13:10 - 22:47LHR-PWM

14h 37m1 stop

£553

Find Deal

Wed, 12 Nov - Wed, 26 Nov

14:34 - 12:30PWM-LCY

16h 56m2 stops

19:20 - 16:44LCY-PWM

26h 24m2 stops

£573

Find Deal

Tue, 7 Oct - Tue, 14 Oct

06:31 - 09:35PWM-LHR

22h 04m2 stops

07:05 - 00:53LHR-PWM

22h 48m3 stops

£602Scandinavian Airlines

Find Deal

Sat, 6 Sep - Tue, 9 Sep

JetBlue flights from Portland, Maine to London

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

JetBlue

8 Oct

PWM14:17Portland

14h 13m

1 stop

LHR09:30London Heathrow

15 Oct

LHR08:15London Heathrow

19h 49m

1 stop

PWM23:04Portland

£473

Find similar

JetBlue

7 Oct

PWM14:17Portland

14h 13m

1 stop

LHR09:30London Heathrow

14 Oct

LHR11:55London Heathrow

15h 06m

1 stop

PWM22:01Portland

£484

Find similar

JetBlue

22 Sept

PWM07:09Portland

21h 21m

1 stop

LHR09:30London Heathrow

29 Sept

LHR08:15London Heathrow

18h 52m

1 stop

PWM22:07Portland

£510

Find similar

Air Canada flights from Portland, Maine to London

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

Air Canada

8 Oct

PWM08:00Portland

17h 30m

3 stops

LHR06:30London Heathrow

15 Oct

LHR08:30London Heathrow

19h 43m

3 stops

PWM23:13Portland

£610

Find similar

Air Canada

7 Oct

PWM08:00Portland

17h 30m

3 stops

LHR06:30London Heathrow

14 Oct

LHR08:30London Heathrow

19h 43m

3 stops

PWM23:13Portland

£656

Find similar

Air Canada

22 Sept

PWM10:39Portland

17h 56m

3 stops

LHR09:35London Heathrow

29 Sept

LHR08:30London Heathrow

19h 43m

3 stops

PWM23:13Portland

£797

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 8/10

14:17-09:30

1 stop14h 13m

London Heathrow

Wed 15/10

08:15-23:04

1 stop19h 49m

£473

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 7/10

14:17-09:30

1 stop14h 13m

London Heathrow

Tue 14/10

11:55-22:01

1 stop15h 06m

£484

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 6/9

06:31-09:35

2 stops22h 04m

London Heathrow

Tue 9/9

07:05-00:53

2 stops22h 48m

£499

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

06:00-06:35

1 stop19h 35m

London Heathrow

Wed 26/11

07:50-18:13

2 stops15h 23m

£530

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

15:53-09:15

2 stops12h 22m

London Heathrow

Wed 26/11

07:50-18:13

2 stops15h 23m

£534

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 7/10

14:34-06:55

1 stop11h 21m

London Heathrow

Tue 14/10

08:45-23:59

2 stops20h 14m

£540

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 8/10

09:59-06:55

1 stop15h 56m

London Heathrow

Wed 15/10

12:05-14:33

2 stops31h 28m

£542

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

15:53-06:35

1 stop9h 42m

London Heathrow

Wed 26/11

13:10-22:47

1 stop14h 37m

£553

PortlandLondon

PWM - LCY

PWMLCY

Portland

Tue 7/10

14:34-12:30

2 stops16h 56m

London City

Tue 14/10

19:20-16:44

2 stops26h 24m

£573

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 6/9

06:31-09:35

2 stops22h 04m

London Heathrow

Tue 9/9

07:05-00:53

3 stops22h 48m

£602

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 October. Flight prices, which tend to average around £500, are often lower during this time because this is during the off-season. The month of November is another great option to travel to London, with average flight prices from Portland, Maine averaging around £539.

What is the cheapest time of day to depart on your flight to London?

The cheapest time of day to fly to London is at midday when flights can be purchased for as low as £522. Flights in the morning are often more expensive, with an average ticket price of £552.

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

Direct flights	None

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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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.

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Slough

Gatwick

Canterbury

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Ipswich

Ilford

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Colchester

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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.