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 43% 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?

American Airlines, Air Canada, and JetBlue 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.

£231 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 £862 to £827. The lowest price recently found on this route was £607.

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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.

06:00 - 21:20

PWM

LHR

10h 20m

1 stop

13:50 - 23:28

LHR

PWM

14h 38m

2 stops

£607United Airlines

Thu, 15 Oct - Fri, 16 Oct

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

11:55 - 00:14

LHR

PWM

17h 19m

1 stop

£616JetBlue

Mon, 3 Aug - Wed, 26 Aug

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

08:15 - 00:14

LHR

PWM

20h 59m

1 stop

£637JetBlue

Fri, 7 Aug - Fri, 21 Aug

16:48 - 07:55

PWM

LHR

34h 07m

1 stop

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£647Brussels Airlines

Sat, 21 Nov - Tue, 24 Nov

06:00 - 09:35

PWM

LHR

22h 35m

2 stops

07:05 - 23:59

LHR

PWM

21h 54m

2 stops

£648Scandinavian Airlines

Thu, 20 Aug - Fri, 11 Sep

14:35 - 16:00

PWM

LHR

20h 25m

2 stops

06:40 - 23:49

LHR

PWM

22h 09m

2 stops

£656Scandinavian Airlines

Thu, 1 Oct - Thu, 15 Oct

17:06 - 10:25

PWM

LHR

12h 19m

1 stop

06:50 - 16:09

LHR

PWM

14h 19m

2 stops

£661United Airlines

Tue, 10 Nov - Tue, 24 Nov

09:52 - 10:00

PWM

LGW

19h 08m

1 stop

14:00 - 10:28

LGW

PWM

25h 28m

1 stop

£664Multiple Airlines

Mon, 7 Sep - Fri, 18 Sep

06:00 - 21:00

PWM

LHR

34h 00m

2 stops

12:40 - 23:28

LHR

PWM

39h 48m

2 stops

£666Air Canada

Sun, 20 Sep - Tue, 29 Sep

07:00 - 10:00

PWM

LGW

46h 00m

2 stops

14:00 - 09:08

LGW

PWM

24h 08m

1 stop

£684Multiple Airlines

Thu, 1 Oct - Thu, 15 Oct

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United Airlines flights from Portland, Maine to London

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

United Airlines

15 Oct

PWM06:00Portland

10h 20m

1 stop

LHR21:20London Heathrow

16 Oct

LHR13:50London Heathrow

14h 38m

2 stops

PWM23:28Portland

£607

United Airlines

10 Nov

PWM17:06Portland

12h 19m

1 stop

LHR10:25London Heathrow

24 Nov

LHR06:50London Heathrow

14h 19m

2 stops

PWM16:09Portland

£661

United Airlines

10 Nov

PWM17:06Portland

12h 19m

1 stop

LHR10:25London Heathrow

24 Nov

LHR06:50London Heathrow

14h 19m

2 stops

PWM16:09Portland

£662

JetBlue flights from Portland, Maine to London

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

JetBlue

3 Aug

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

26 Aug

LHR11:55London Heathrow

17h 19m

1 stop

PWM00:14Portland

£616

JetBlue

7 Aug

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

21 Aug

LHR08:15London Heathrow

20h 59m

1 stop

PWM00:14Portland

£637

JetBlue

20 Aug

PWM06:00Portland

9h 45m

1 stop

LHR20:45London Heathrow

9 Sept

LHR11:55London Heathrow

16h 57m

1 stop

PWM23:52Portland

£678

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 15/10

06:00-21:20

1 stop10h 20m

London Heathrow

Fri 16/10

13:50-23:28

2 stops14h 38m

£607

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/8

06:00-20:45

1 stop9h 45m

London Heathrow

Wed 26/8

11:55-00:14

1 stop17h 19m

£616

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 7/8

06:00-20:45

1 stop9h 45m

London Heathrow

Fri 21/8

08:15-00:14

1 stop20h 59m

£637

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 21/11

16:48-07:55

1 stop34h 07m

London Heathrow

Tue 24/11

06:50-16:09

2 stops14h 19m

£647

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 20/8

06:00-09:35

2 stops22h 35m

London Heathrow

Fri 11/9

07:05-23:59

2 stops21h 54m

£648

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 1/10

14:35-16:00

2 stops20h 25m

London Heathrow

Thu 15/10

06:40-23:49

2 stops22h 09m

£656

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

17:06-10:25

1 stop12h 19m

London Heathrow

Tue 24/11

06:50-16:09

2 stops14h 19m

£661

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 7/9

09:52-10:00

1 stop19h 08m

London Gatwick

Fri 18/9

14:00-10:28

1 stop25h 28m

£664

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 20/9

06:00-21:00

2 stops34h 00m

London Heathrow

Tue 29/9

12:40-23:28

2 stops39h 48m

£666

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 1/10

07:00-10:00

2 stops46h 00m

London Gatwick

Thu 15/10

14:00-09:08

1 stop24h 08m

£684

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 20m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 20m

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 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.

Eastbourne

Wembley

Milton Keynes

Gatwick

Luton

Slough

Southend-on-Sea

Maidstone

Ipswich

Ilford

Canterbury

Folkestone

Guildford

Hayes

Bedford

Chichester

Dover

Harlow

Chelmsford

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.

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Cheap flights from Portland, Maine to London from £231

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 8/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from Portland, Maine to London

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

JetBlue flights from Portland, Maine to London

Our best JetBlue 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

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List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

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