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 47% 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?

United Airlines is the most popular carrier 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.

£384 Cheap Flights from Portland to London in 2025/26

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Last minute

Cheap return flights

13:25 - 07:50PWM-LHR

13h 25m1 stop

09:00 - 22:19LHR-PWM

18h 19m2 stops

£384Virgin Atlantic

Find Deal

Wed, 12 Nov - Thu, 20 Nov

14:30 - 06:20PWM-LHR

10h 50m1 stop

11:45 - 23:54LHR-PWM

17h 09m2 stops

£385Delta

Find Deal

Tue, 11 Nov - Thu, 20 Nov

12:48 - 09:20PWM-LHR

15h 32m2 stops

11:30 - 23:54LHR-PWM

17h 24m2 stops

£388Delta

Find Deal

Tue, 11 Nov - Wed, 19 Nov

12:48 - 09:20PWM-LHR

15h 32m2 stops

11:45 - 23:54LHR-PWM

17h 09m2 stops

£389Delta

Find Deal

Tue, 11 Nov - Fri, 21 Nov

16:53 - 08:45PWM-LHR

10h 52m1 stop

08:55 - 22:19LHR-PWM

18h 24m1 stop

£390KLM

Find Deal

Tue, 11 Nov - Thu, 20 Nov

13:25 - 07:50PWM-LHR

13h 25m1 stop

08:55 - 22:19LHR-PWM

18h 24m1 stop

£427KLM

Find Deal

Thu, 13 Nov - Fri, 21 Nov

14:30 - 18:30PWM-LHR

23h 00m3 stops

06:40 - 23:54LHR-PWM

22h 14m2 stops

£446Scandinavian Airlines

Find Deal

Fri, 14 Nov - Mon, 17 Nov

06:35 - 16:00PWM-LHR

28h 25m2 stops

06:40 - 23:54LHR-PWM

22h 14m2 stops

£452Scandinavian Airlines

Find Deal

Thu, 13 Nov - Wed, 19 Nov

16:53 - 08:45PWM-LHR

10h 52m1 stop

16:10 - 23:54LHR-PWM

12h 44m1 stop

£456Air France

Find Deal

Thu, 13 Nov - Thu, 20 Nov

07:09 - 09:30PWM-LHR

21h 21m1 stop

11:55 - 23:04LHR-PWM

16h 09m1 stop

£518JetBlue

Find Deal

Wed, 15 Oct - Sun, 19 Oct

Delta flights from Portland, Maine to London

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

Delta

24 Sept

PWM14:41Portland

14h 19m

1 stop

LHR10:00London Heathrow

30 Sept

LHR09:00London Heathrow

20h 34m

2 stops

PWM00:34Portland

£384

Find similar

Delta

11 Nov

PWM14:30Portland

10h 50m

1 stop

LHR06:20London Heathrow

20 Nov

LHR11:45London Heathrow

17h 09m

2 stops

PWM23:54Portland

£385

Find similar

Delta

24 Sept

PWM17:00Portland

15h 30m

2 stops

LHR13:30London Heathrow

30 Sept

LHR09:00London Heathrow

20h 34m

2 stops

PWM00:34Portland

£387

Find similar

KLM flights from Portland, Maine to London

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

KLM

11 Nov

PWM16:53Portland

10h 52m

1 stop

LHR08:45London Heathrow

20 Nov

LHR08:55London Heathrow

18h 24m

1 stop

PWM22:19Portland

£390

Find similar

KLM

26 Sept

PWM13:35Portland

12h 10m

1 stop

LHR06:45London Heathrow

10 Oct

LHR16:05London Heathrow

13h 00m

1 stop

PWM00:05Portland

£427

Find similar

KLM

15 Oct

PWM14:38Portland

13h 12m

1 stop

LHR08:50London Heathrow

24 Oct

LHR16:05London Heathrow

13h 00m

1 stop

PWM00:05Portland

£494

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 12/11

13:25-07:50

1 stop13h 25m

London Heathrow

Thu 20/11

09:00-22:19

2 stops18h 19m

£384

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

14:30-06:20

1 stop10h 50m

London Heathrow

Thu 20/11

11:45-23:54

2 stops17h 09m

£385

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

12:48-09:20

2 stops15h 32m

London Heathrow

Wed 19/11

11:30-23:54

2 stops17h 24m

£388

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

12:48-09:20

2 stops15h 32m

London Heathrow

Fri 21/11

11:45-23:54

2 stops17h 09m

£389

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

16:53-08:45

1 stop10h 52m

London Heathrow

Thu 20/11

08:55-22:19

1 stop18h 24m

£390

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 13/11

13:25-07:50

1 stop13h 25m

London Heathrow

Fri 21/11

08:55-22:19

1 stop18h 24m

£427

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 14/11

14:30-18:30

3 stops23h 00m

London Heathrow

Mon 17/11

06:40-23:54

2 stops22h 14m

£446

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 13/11

06:35-16:00

2 stops28h 25m

London Heathrow

Wed 19/11

06:40-23:54

2 stops22h 14m

£452

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 13/11

16:53-08:45

1 stop10h 52m

London Heathrow

Thu 20/11

16:10-23:54

1 stop12h 44m

£456

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 15/10

07:09-09:30

1 stop21h 21m

London Heathrow

Sun 19/10

11:55-23:04

1 stop16h 09m

£518

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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 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 £518. Flights in the morning are often more expensive, with an average ticket price of £548.

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.

Search flight deals

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 20m 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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Gatwick

Slough

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Hayes

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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.