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

Scandinavian Airlines, 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 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.

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.

£260 Cheap Flights from Portland to London in 2025/26

Q: What is the typical price of a round-trip flight between Portland, Maine and London?

Prices are currently low for flights on this route. Typical prices usually range from £577 to £622. The lowest price recently found on this route was £450.

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:00 - 06:20PWM-LHR

19h 20m1 stop

11:45 - 23:54LHR-PWM

17h 09m2 stops

£450Delta

Find Deal

Sun, 9 Nov - Tue, 18 Nov

16:40 - 11:25PWM-LHR

13h 45m2 stops

10:00 - 23:19LHR-PWM

18h 19m2 stops

£453Delta

Find Deal

Sun, 9 Nov - Tue, 18 Nov

11:25 - 06:20PWM-LHR

13h 55m1 stop

16:10 - 23:54LHR-PWM

12h 44m1 stop

£455Delta

Find Deal

Tue, 11 Nov - Tue, 18 Nov

06:00 - 06:35PWM-LHR

19h 35m1 stop

07:50 - 18:10LHR-PWM

15h 20m2 stops

£468American Airlines

Find Deal

Tue, 11 Nov - Tue, 18 Nov

06:00 - 11:20PWM-LHR

24h 20m2 stops

13:25 - 17:48LHR-PWM

33h 23m2 stops

£471Air Canada

Find Deal

Tue, 11 Nov - Tue, 18 Nov

14:20 - 08:25PWM-LHR

13h 05m2 stops

06:50 - 17:48LHR-PWM

15h 58m2 stops

£474United Airlines

Find Deal

Tue, 11 Nov - Tue, 18 Nov

06:00 - 20:35PWM-LHR

33h 35m2 stops

09:00 - 17:48LHR-PWM

37h 48m2 stops

£513Air Canada

Find Deal

Mon, 10 Nov - Sun, 16 Nov

19:46 - 11:05PWM-LHR

10h 19m1 stop

16:20 - 23:59LHR-PWM

12h 39m1 stop

£530United Airlines

Find Deal

Fri, 12 Dec - Fri, 19 Dec

06:00 - 20:45PWM-LHR

9h 45m1 stop

11:55 - 23:36LHR-PWM

16h 41m1 stop

£559JetBlue

Find Deal

Sun, 12 Apr - Wed, 22 Apr

06:00 - 20:45PWM-LHR

9h 45m1 stop

11:55 - 23:36LHR-PWM

16h 41m1 stop

£601JetBlue

Find Deal

Sun, 12 Apr - Mon, 27 Apr

Delta flights from Portland, Maine to London

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

Delta

9 Nov

PWM06:00Portland

19h 20m

1 stop

LHR06:20London Heathrow

18 Nov

LHR11:45London Heathrow

17h 09m

2 stops

PWM23:54Portland

£450

Find similar

Delta

9 Nov

PWM16:40Portland

13h 45m

2 stops

LHR11:25London Heathrow

18 Nov

LHR10:00London Heathrow

18h 19m

2 stops

PWM23:19Portland

£453

Find similar

Delta

11 Nov

PWM11:25Portland

13h 55m

1 stop

LHR06:20London Heathrow

18 Nov

LHR16:10London Heathrow

12h 44m

1 stop

PWM23:54Portland

£455

Find similar

Air Canada flights from Portland, Maine to London

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

Air Canada

11 Nov

PWM06:00Portland

24h 20m

2 stops

LHR11:20London Heathrow

18 Nov

LHR13:25London Heathrow

33h 23m

2 stops

PWM17:48Portland

£471

Find similar

Air Canada

7 Nov

PWM19:46Portland

56h 34m

2 stops

LHR09:20London Heathrow

18 Nov

LHR09:00London Heathrow

37h 48m

2 stops

PWM17:48Portland

£479

Find similar

Air Canada

10 Nov

PWM06:00Portland

33h 35m

2 stops

LHR20:35London Heathrow

16 Nov

LHR09:00London Heathrow

37h 48m

2 stops

PWM17:48Portland

£513

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 9/11

06:00-06:20

1 stop19h 20m

London Heathrow

Tue 18/11

11:45-23:54

2 stops17h 09m

£450

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 9/11

16:40-11:25

2 stops13h 45m

London Heathrow

Tue 18/11

10:00-23:19

2 stops18h 19m

£453

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

11:25-06:20

1 stop13h 55m

London Heathrow

Tue 18/11

16:10-23:54

1 stop12h 44m

£455

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

06:00-06:35

1 stop19h 35m

London Heathrow

Tue 18/11

07:50-18:10

2 stops15h 20m

£468

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

06:00-11:20

2 stops24h 20m

London Heathrow

Tue 18/11

13:25-17:48

2 stops33h 23m

£471

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/11

14:20-08:25

2 stops13h 05m

London Heathrow

Tue 18/11

06:50-17:48

2 stops15h 58m

£474

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 10/11

06:00-20:35

2 stops33h 35m

London Heathrow

Sun 16/11

09:00-17:48

2 stops37h 48m

£513

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 12/12

19:46-11:05

1 stop10h 19m

London Heathrow

Fri 19/12

16:20-23:59

1 stop12h 39m

£530

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 12/4

06:00-20:45

1 stop9h 45m

London Heathrow

Wed 22/4

11:55-23:36

1 stop16h 41m

£559

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 12/4

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 27/4

11:55-23:36

1 stop16h 41m

£601

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?

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 £484, 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 £531.

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 £537. Flights in the morning are often more expensive, with an average ticket price of £567.

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 9h 35m 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

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Colchester

Dover

Hayes

Chelmsford

Worthing

Dartford

Ramsgate

Bedford

Stansted

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.