Which airlines fly to London?

British Airways, Virgin Atlantic and JetBlue 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 42% of people opting to fly with this airline when travelling to London. Keep in mind that there are 9 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?

Delta, TAP AIR PORTUGAL, and Air Canada 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.

£255 Cheap Flights from Portland, Maine to London in 2026

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 £756 to £650. The lowest price recently found on this route was £565.

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

19:22 - 10:50

PWM

LHR

10h 28m

1 stop

06:50 - 18:13

LHR

PWM

16h 23m

2 stops

£565United Airlines

Wed, 11 Nov - Fri, 13 Nov

14:45 - 09:10

PWM

LHR

13h 25m

2 stops

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£616United Airlines

Wed, 11 Nov - Fri, 13 Nov

14:45 - 09:10

PWM

LHR

13h 25m

2 stops

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£617United Airlines

Wed, 11 Nov - Fri, 13 Nov

14:35 - 09:20

PWM

LHR

13h 45m

2 stops

19:30 - 23:49

LHR

PWM

33h 19m

2 stops

£618Scandinavian Airlines

Tue, 10 Nov - Tue, 17 Nov

06:30 - 06:20

PWM

LHR

18h 50m

1 stop

06:30 - 22:23

LHR

PWM

20h 53m

2 stops

£645Delta

Tue, 10 Nov - Tue, 17 Nov

13:35 - 09:00

PWM

LHR

14h 25m

1 stop

06:30 - 23:49

LHR

PWM

22h 19m

2 stops

£645Delta

Tue, 10 Nov - Tue, 17 Nov

06:30 - 09:10

PWM

LGW

21h 40m

2 stops

06:25 - 23:43

LGW

PWM

22h 18m

2 stops

£759Turkish Airlines

Tue, 3 Nov - Tue, 10 Nov

06:00 - 16:35

PWM

LGW

29h 35m

2 stops

07:00 - 23:52

LGW

PWM

21h 52m

2 stops

£771Turkish Airlines

Thu, 15 Oct - Tue, 20 Oct

09:52 - 10:00

PWM

LGW

19h 08m

1 stop

14:00 - 09:12

LGW

PWM

24h 12m

1 stop

£776Multiple Airlines

Fri, 3 Jul - Fri, 10 Jul

06:30 - 15:45

PWM

LGW

28h 15m

2 stops

10:40 - 23:43

LGW

PWM

18h 03m

2 stops

£790Multiple Airlines

Sun, 8 Nov - Mon, 16 Nov

KLM flights from Portland, Maine to London

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

KLM

10 Nov

PWM14:35Portland

12h 30m

1 stop

LHR08:05London Heathrow

24 Nov

LHR16:10London Heathrow

12h 39m

1 stop

PWM23:49Portland

£666

KLM

10 Nov

PWM16:50Portland

10h 55m

1 stop

LHR08:45London Heathrow

24 Nov

LHR16:40London Heathrow

12h 09m

1 stop

PWM23:49Portland

£667

KLM

18 Jun

PWM06:25Portland

20h 15m

2 stops

LHR07:40London Heathrow

25 Jun

LHR11:45London Heathrow

18h 07m

2 stops

PWM00:52Portland

£787

Austrian Airlines flights from Portland, Maine to London

Our best Austrian Airlines deals on Portland, Maine to London flight tickets

Austrian Airlines

10 Nov

PWM11:17Portland

16h 08m

1 stop

LHR08:25London Heathrow

17 Nov

LHR08:00London Heathrow

15h 13m

1 stop

PWM18:13Portland

£658

Austrian Airlines

7 Jul

PWM10:55Portland

15h 20m

1 stop

LHR07:15London Heathrow

14 Jul

LHR07:45London Heathrow

15h 44m

1 stop

PWM18:29Portland

£780

Austrian Airlines

29 May

PWM10:55Portland

18h 30m

1 stop

LHR10:25London Heathrow

3 Jun

LHR19:30London Heathrow

27h 55m

2 stops

PWM18:25Portland

£1,800

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 11/11

19:22-10:50

1 stop10h 28m

London Heathrow

Fri 13/11

06:50-18:13

2 stops16h 23m

£565

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 11/11

14:45-09:10

2 stops13h 25m

London Heathrow

Fri 13/11

06:50-16:09

2 stops14h 19m

£616

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 11/11

14:45-09:10

2 stops13h 25m

London Heathrow

Fri 13/11

06:50-16:09

2 stops14h 19m

£617

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:35-09:20

2 stops13h 45m

London Heathrow

Tue 17/11

19:30-23:49

2 stops33h 19m

£618

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

06:30-06:20

1 stop18h 50m

London Heathrow

Tue 17/11

06:30-22:23

2 stops20h 53m

£645

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

13:35-09:00

1 stop14h 25m

London Heathrow

Tue 17/11

06:30-23:49

2 stops22h 19m

£645

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 3/11

06:30-09:10

2 stops21h 40m

London Gatwick

Tue 10/11

06:25-23:43

2 stops22h 18m

£759

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 15/10

06:00-16:35

2 stops29h 35m

London Gatwick

Tue 20/10

07:00-23:52

2 stops21h 52m

£771

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 3/7

09:52-10:00

1 stop19h 08m

London Gatwick

Fri 10/7

14:00-09:12

1 stop24h 12m

£776

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sun 8/11

06:30-15:45

2 stops28h 15m

London Gatwick

Mon 16/11

10:40-23:43

2 stops18h 03m

£790

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 £0, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Portland, Maine averaging around £0.

Can stopping save me money on Portland, Maine to London flights?

You could potentially save up to 26% 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

Fastest flight time	10h 28m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 28m

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 28m 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

Gatwick

Luton

Wembley

Slough

Maidstone

Ipswich

Southend-on-Sea

Canterbury

Ilford

Hayes

Guildford

Folkestone

Chelmsford

Dover

Bedford

Chichester

Colchester

Harlow

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 £255

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 23/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

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Filter for what you want

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KLM flights from Portland, Maine to London

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

Austrian Airlines flights from Portland, Maine to London

Our best Austrian Airlines 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 typical price of a round-trip flight between Portland, Maine and 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

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to London

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.

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Complete your trip to London

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