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

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 44% of people opting to fly with this airline when travelling to London. Keep in mind that there are 8 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.

£240 Cheap Flights from Portland, Maine to London in 2026

Find the cheapest flights from Portland, Maine to London

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

08:45 - 08:25-

18h 40m

06:50 - 23:21-

21h 31m

£549United Airlines

Mon, 9 Nov - Wed, 11 Nov

15:10 - 10:05-

13h 55m

07:40 - 18:52-

16h 12m

£569United Airlines

Mon, 9 Nov - Wed, 11 Nov

06:00 - 20:45-

9h 45m

08:15 - 23:54-

20h 39m

£626JetBlue

Fri, 25 Sep - Mon, 28 Sep

14:05 - 06:40-

11h 35m

06:50 - 19:02-

17h 12m

£642United Airlines

Tue, 10 Nov - Tue, 24 Nov

14:40 - 09:30-

13h 50m

11:55 - 00:25-

17h 30m

£643JetBlue

Wed, 26 Aug - Thu, 3 Sep

16:03 - 10:30-

13h 27m

10:00 - 23:55-

18h 55m

£644Delta

Tue, 10 Nov - Tue, 24 Nov

15:10 - 11:05-

14h 55m

06:50 - 18:52-

17h 02m

£644United Airlines

Tue, 10 Nov - Tue, 17 Nov

06:00 - 07:45-

20h 45m

06:30 - 23:33-

22h 03m

£646Delta

Tue, 10 Nov - Tue, 17 Nov

06:00 - 07:45-

20h 45m

06:30 - 23:33-

22h 03m

£647Delta

Tue, 10 Nov - Tue, 17 Nov

14:05 - 09:10-

14h 05m

06:50 - 18:52-

17h 02m

£647United Airlines

Tue, 10 Nov - Tue, 17 Nov

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

JetBlue flights from Portland, Maine to London

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

JetBlue

25 Sept

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

28 Sept

LHR08:15London Heathrow

20h 39m

1 stop

PWM23:54Portland

£626

JetBlue

26 Aug

PWM14:40Portland

13h 50m

1 stop

LHR09:30London Heathrow

3 Sept

LHR11:55London Heathrow

17h 30m

1 stop

PWM00:25Portland

£643

JetBlue

25 Sept

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

28 Sept

LHR08:15London Heathrow

20h 39m

1 stop

PWM23:54Portland

£658

Delta flights from Portland, Maine to London

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

Delta

10 Nov

PWM16:03Portland

13h 27m

1 stop

LHR10:30London Heathrow

17 Nov

LHR10:00London Heathrow

18h 55m

2 stops

PWM23:55Portland

£644

Delta

10 Nov

PWM06:00Portland

20h 45m

2 stops

LHR07:45London Heathrow

17 Nov

LHR06:30London Heathrow

22h 03m

2 stops

PWM23:33Portland

£646

Delta

10 Nov

PWM06:00Portland

20h 45m

2 stops

LHR07:45London Heathrow

17 Nov

LHR06:30London Heathrow

22h 03m

2 stops

PWM23:33Portland

£647

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 9/11

08:45-08:25

1 stop18h 40m

London Heathrow

Wed 11/11

06:50-23:21

2 stops21h 31m

£549

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 9/11

15:10-10:05

2 stops13h 55m

London Heathrow

Wed 11/11

07:40-18:52

2 stops16h 12m

£569

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 25/9

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 28/9

08:15-23:54

1 stop20h 39m

£626

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:05-06:40

1 stop11h 35m

London Heathrow

Tue 24/11

06:50-19:02

2 stops17h 12m

£642

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 26/8

14:40-09:30

1 stop13h 50m

London Heathrow

Thu 3/9

11:55-00:25

1 stop17h 30m

£643

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

16:03-10:30

1 stop13h 27m

London Heathrow

Tue 24/11

10:00-23:55

2 stops18h 55m

£644

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

15:10-11:05

1 stop14h 55m

London Heathrow

Tue 17/11

06:50-18:52

2 stops17h 02m

£644

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

06:00-07:45

2 stops20h 45m

London Heathrow

Tue 17/11

06:30-23:33

2 stops22h 03m

£646

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

06:00-07:45

2 stops20h 45m

London Heathrow

Tue 17/11

06:30-23:33

2 stops22h 03m

£647

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:05-09:10

2 stops14h 05m

London Heathrow

Tue 17/11

06:50-18:52

2 stops17h 02m

£647

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?

Prices are currently typical for flights on this route.

Typical prices usually range from £532 to £645.
The lowest price recently found on this route was £549.

What is the cheapest month to fly to London?

The cheapest month to fly to London from Portland, Maine is in January. Flight prices, which tend to average around £0, 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 £520.

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

Wembley

Gatwick

Milton Keynes

Luton

Southend-on-Sea

Slough

Ipswich

Maidstone

Folkestone

Ilford

Hastings

Canterbury

Guildford

Chichester

Hayes

Bedford

Harlow

Colchester

Chelmsford

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

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.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Fri 4/9

Fri 11/9

Email me momondo's favourite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Nearby airports

Airlines

Cabin classes

Other United Kingdom destinations

Complete your trip

Feeling lucky

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Cheap flights from Portland, Maine to London from £240

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 10/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Portland, Maine to London

Cheap return flights

Cheap one-way flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

JetBlue flights from Portland, Maine to London

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

Delta flights from Portland, Maine to London

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

momondo Fare Finder

Use the filters below to find and compare flights from Portland, Maine to London that are best for you.

See travel insights to London from

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

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

Explore popular destinations other users love

According to popular flight searches on momondo this year