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

KLM, Delta, and United Airlines are the most popular carriers operating from Portland to London

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.

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.

£229 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 £849 to £755. The lowest price recently found on this route was £592.

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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.

20:14 - 10:00

PWM

LGW

32h 46m

1 stop

14:00 - 09:08

LGW

PWM

24h 08m

1 stop

£592Multiple Airlines

Thu, 24 Sep - Sun, 27 Sep

06:30 - 09:35

PWM

LHR

22h 05m

2 stops

06:40 - 23:59

LHR

PWM

22h 19m

2 stops

£610Scandinavian Airlines

Sat, 12 Sep - Sat, 26 Sep

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

11:55 - 00:14

LHR

PWM

17h 19m

1 stop

£615JetBlue

Thu, 6 Aug - Thu, 3 Sep

10:00 - 09:20

PWM

LHR

18h 20m

2 stops

06:40 - 23:49

LHR

PWM

22h 09m

2 stops

£620Scandinavian Airlines

Tue, 10 Nov - Tue, 17 Nov

10:00 - 09:20

PWM

LHR

18h 20m

2 stops

10:20 - 23:49

LHR

PWM

42h 29m

2 stops

£621Scandinavian Airlines

Tue, 10 Nov - Tue, 17 Nov

14:35 - 09:20

PWM

LHR

13h 45m

2 stops

06:40 - 23:49

LHR

PWM

22h 09m

2 stops

£622Scandinavian Airlines

Tue, 10 Nov - Tue, 24 Nov

14:35 - 09:20

PWM

LHR

13h 45m

2 stops

06:40 - 23:49

LHR

PWM

22h 09m

2 stops

£622Scandinavian Airlines

Tue, 10 Nov - Tue, 24 Nov

06:00 - 07:50

PWM

LHR

20h 50m

1 stop

06:30 - 22:23

LHR

PWM

20h 53m

2 stops

£644Delta

Tue, 10 Nov - Tue, 17 Nov

14:35 - 09:35

PWM

LHR

14h 00m

1 stop

08:40 - 23:49

LHR

PWM

20h 09m

2 stops

£645Delta

Tue, 10 Nov - Tue, 24 Nov

06:00 - 09:55

PWM

LGW

46h 55m

2 stops

17:35 - 23:52

LGW

PWM

35h 17m

2 stops

£717Turkish Airlines

Thu, 15 Oct - Tue, 20 Oct

Delta flights from Portland, Maine to London

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

Delta

10 Nov

PWM13:35Portland

17h 05m

1 stop

LHR11:40London Heathrow

24 Nov

LHR06:30London Heathrow

20h 53m

2 stops

PWM22:23Portland

£644

Delta

10 Nov

PWM14:35Portland

14h 00m

1 stop

LHR09:35London Heathrow

24 Nov

LHR08:40London Heathrow

20h 09m

2 stops

PWM23:49Portland

£645

Delta

18 Aug

PWM12:47Portland

13h 28m

2 stops

LHR07:15London Heathrow

27 Aug

LHR08:40London Heathrow

19h 33m

2 stops

PWM23:13Portland

£648

United Airlines flights from Portland, Maine to London

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

United Airlines

2 Jul

PWM20:15Portland

20h 10m

1 stop

LHR21:25London Heathrow

11 Jul

LHR06:50London Heathrow

22h 01m

2 stops

PWM23:51Portland

£790

United Airlines

3 Jun

PWM15:16Portland

13h 44m

2 stops

LHR10:00London Heathrow

10 Jun

LHR06:50London Heathrow

16h 45m

2 stops

PWM18:35Portland

£792

United Airlines

2 Jul

PWM20:15Portland

29h 15m

2 stops

LHR06:30London Heathrow

6 Jul

LHR06:50London Heathrow

17h 37m

2 stops

PWM19:27Portland

£796

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 24/9

20:14-10:00

1 stop32h 46m

London Gatwick

Sun 27/9

14:00-09:08

1 stop24h 08m

£592

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 12/9

06:30-09:35

2 stops22h 05m

London Heathrow

Sat 26/9

06:40-23:59

2 stops22h 19m

£610

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 6/8

06:00-20:45

1 stop9h 45m

London Heathrow

Thu 3/9

11:55-00:14

1 stop17h 19m

£615

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

10:00-09:20

2 stops18h 20m

London Heathrow

Tue 17/11

06:40-23:49

2 stops22h 09m

£620

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

10:00-09:20

2 stops18h 20m

London Heathrow

Tue 17/11

10:20-23:49

2 stops42h 29m

£621

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:35-09:20

2 stops13h 45m

London Heathrow

Tue 24/11

06:40-23:49

2 stops22h 09m

£622

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:35-09:20

2 stops13h 45m

London Heathrow

Tue 24/11

06:40-23:49

2 stops22h 09m

£622

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

06:00-07:50

1 stop20h 50m

London Heathrow

Tue 17/11

06:30-22:23

2 stops20h 53m

£644

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:35-09:35

1 stop14h 00m

London Heathrow

Tue 24/11

08:40-23:49

2 stops20h 09m

£645

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 15/10

06:00-09:55

2 stops46h 55m

London Gatwick

Tue 20/10

17:35-23:52

2 stops35h 17m

£717

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	9h 45m
Direct flights	None

The fastest flight from Portland, Maine to London takes 9h 45m

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 9h 45m 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

Southend-on-Sea

Ipswich

Ilford

Canterbury

Guildford

Hayes

Folkestone

Chelmsford

Dover

Bedford

Chichester

Harlow

Colchester

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.

An easier way to manage your London trip

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Cheap flights from Portland, Maine to London from £229

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 15/7. 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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Delta flights from Portland, Maine to London

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

United Airlines flights from Portland, Maine to London

Our best United 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

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