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

JetBlue, American Airlines, and Delta are the most popular carriers operating from Portland to London

What airlines fly to London?

British Airways, Delta and American Airlines 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 46% of people opting to fly with this airline when traveling to London. Keep in mind that there are 16 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?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London.

What documentation or ID do you need to fly to London?

The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$320 Cheap Flights from Portland, Maine to London in 2026/27

Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:35 am - 10:05 amPWM Portland-LHR London Heathrow

23h 30m2 stops Newark Brussels Bruxelles-National

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

43h 21m2 stops Halifax Intl Newark

$734United Airlines

Mon, Nov 16 - Wed, Nov 18

2:05 pm - 10:50 amPWM Portland-LHR London Heathrow

15h 45m1 stop Washington, D.C. Dulles Intl

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

19h 21m2 stops Zurich Newark

$735United Airlines

Mon, Nov 16 - Wed, Nov 18

8:49 am - 7:10 amPWM Portland-LHR London Heathrow

41h 21m2 stops Newark Montreal Pierre Elliott Trudeau Intl

6:50 am - 11:21 pmLHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

$739United Airlines

Mon, Nov 9 - Thu, Nov 12

5:08 pm - 7:55 amPWM Portland-LHR London Heathrow

33h 47m1 stop Chicago O'Hare Intl

6:50 am - 11:21 pmLHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

$741United Airlines

Sun, Nov 1 - Wed, Nov 4

5:08 pm - 7:55 amPWM Portland-LHR London Heathrow

33h 47m1 stop Chicago O'Hare Intl

6:50 am - 7:02 pmLHR London Heathrow-PWM Portland

17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

$741United Airlines

Mon, Nov 9 - Thu, Nov 12

5:35 am - 10:05 amPWM Portland-LHR London Heathrow

23h 30m2 stops Newark Brussels Bruxelles-National

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

43h 21m2 stops Halifax Intl Newark

$742United Airlines

Mon, Nov 16 - Wed, Nov 18

2:05 pm - 10:50 amPWM Portland-LHR London Heathrow

15h 45m1 stop Washington, D.C. Dulles Intl

9:00 am - 11:21 pmLHR London Heathrow-PWM Portland

19h 21m2 stops Zurich Newark

$743United Airlines

Mon, Nov 16 - Wed, Nov 18

6:30 am - 9:40 pmPWM Portland-LHR London Heathrow

10h 10m1 stop New York John F Kennedy Intl

7:45 am - 11:43 pmLHR London Heathrow-PWM Portland

20h 58m1 stop New York John F Kennedy Intl

$848JetBlue

Wed, Nov 11 - Sun, Nov 15

6:30 am - 9:40 pmPWM Portland-LHR London Heathrow

11h 10m1 stop New York John F Kennedy Intl

8:05 am - 11:43 pmLHR London Heathrow-PWM Portland

20h 38m1 stop New York John F Kennedy Intl

$848JetBlue

Mon, Oct 26 - Mon, Nov 2

6:00 am - 8:45 pmPWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

12:20 pm - 11:43 pmLHR London Heathrow-PWM Portland

16h 23m1 stop New York John F Kennedy Intl

$848JetBlue

Wed, Oct 21 - Sat, Nov 7

Cheap last minute flights

Enter your travel dates to find the best prices.

11:55 am - 10:20 amPWM Portland-LHR London Heathrow

17h 25m1 stop Minneapolis St Paul

11:45 am - 12:10 amLHR London Heathrow-PWM Portland

17h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$862KLM

Tue, Oct 6 - Thu, Oct 22

12:42 pm - 7:10 amPWM Portland-LHR London Heathrow

13h 28m1 stop Detroit Metropolitan Wayne County

11:45 am - 12:10 amLHR London Heathrow-PWM Portland

17h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$862KLM

Tue, Oct 6 - Tue, Oct 20

2:09 pm - 11:20 amPWM Portland-LHR London Heathrow

16h 11m1 stop Atlanta Hartsfield-Jackson

11:45 am - 12:10 amLHR London Heathrow-PWM Portland

17h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$862KLM

Tue, Oct 6 - Wed, Oct 21

8:03 am - 5:55 amPWM Portland-LHR London Heathrow

16h 52m1 stop Newark

6:50 am - 6:12 pmLHR London Heathrow-PWM Portland

16h 22m2 stops Brussels Bruxelles-National Newark

$871United Airlines

Fri, Oct 2 - Tue, Oct 6

6:00 am - 6:30 amPWM Portland-LHR London Heathrow

19h 30m2 stops Newark Ottawa

6:50 am - 11:28 pmLHR London Heathrow-PWM Portland

21h 38m2 stops Brussels Bruxelles-National Newark

$871United Airlines

Mon, Oct 5 - Fri, Oct 9

6:02 am - 6:45 amPWM Portland-LHR London Heathrow

19h 43m1 stop New York John F Kennedy Intl

8:40 am - 12:10 amLHR London Heathrow-PWM Portland

20h 30m2 stops Amsterdam Schiphol New York John F Kennedy Intl

$871Delta

Fri, Oct 2 - Tue, Oct 6

6:00 am - 8:45 pmPWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

8:15 am - 11:54 pmLHR London Heathrow-PWM Portland

20h 39m1 stop New York John F Kennedy Intl

$871JetBlue

Fri, Oct 2 - Tue, Oct 6

6:00 am - 8:45 pmPWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

11:55 am - 11:54 pmLHR London Heathrow-PWM Portland

16h 59m1 stop New York John F Kennedy Intl

$871JetBlue

Mon, Oct 5 - Sat, Oct 10

7:25 pm - 10:40 amPWM Portland-LHR London Heathrow

10h 15m1 stop Washington, D.C. Dulles Intl

6:50 am - 11:28 pmLHR London Heathrow-PWM Portland

21h 38m2 stops Brussels Bruxelles-National Newark

$871United Airlines

Mon, Oct 5 - Fri, Oct 9

6:00 am - 8:45 pmPWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

11:55 am - 11:54 pmLHR London Heathrow-PWM Portland

16h 59m1 stop New York John F Kennedy Intl

$871JetBlue

Mon, Oct 5 - Fri, Oct 9

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JetBlue flights from Portland, Maine to London

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

JetBlue

Oct 26

PWM6:30 amPortland

11h 10m

1 stop

LHR9:40 pmLondon Heathrow

Nov 2

LHR8:05 amLondon Heathrow

20h 38m

1 stop

PWM11:43 pmPortland

$848

JetBlue

Nov 10

PWM6:30 amPortland

10h 10m

1 stop

LHR9:40 pmLondon Heathrow

Nov 17

LHR12:20 pmLondon Heathrow

16h 23m

1 stop

PWM11:43 pmPortland

$871

JetBlue

Oct 11

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Oct 19

LHR11:55 amLondon Heathrow

16h 59m

1 stop

PWM11:54 pmPortland

$989

Delta flights from Portland, Maine to London

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

Delta

Oct 10

PWM2:33 pmPortland

11h 42m

1 stop

LHR7:15 amLondon Heathrow

Oct 21

LHR11:45 amLondon Heathrow

16h 33m

2 stops

PWM11:18 pmPortland

$862

Delta

Nov 12

PWM12:45 pmPortland

14h 00m

1 stop

LHR7:45 amLondon Heathrow

Nov 19

LHR8:40 amLondon Heathrow

19h 51m

2 stops

PWM11:31 pmPortland

$863

Delta

Oct 26

PWM11:55 amPortland

15h 10m

1 stop

LHR7:05 amLondon Heathrow

Nov 2

LHR6:30 amLondon Heathrow

19h 30m

2 stops

PWM9:00 pmPortland

$864

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/16

5:35 am-10:05 am

2 stops23h 30m

London Heathrow

Wed 11/18

9:00 am-11:21 pm

2 stops43h 21m

$734

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/16

2:05 pm-10:50 am

1 stop15h 45m

London Heathrow

Wed 11/18

9:00 am-11:21 pm

2 stops19h 21m

$735

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/9

8:49 am-7:10 am

2 stops41h 21m

London Heathrow

Thu 11/12

6:50 am-11:21 pm

2 stops21h 31m

$739

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Sun 11/1

5:08 pm-7:55 am

1 stop33h 47m

London Heathrow

Wed 11/4

6:50 am-11:21 pm

2 stops21h 31m

$741

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/9

5:08 pm-7:55 am

1 stop33h 47m

London Heathrow

Thu 11/12

6:50 am-7:02 pm

2 stops17h 12m

$741

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/16

5:35 am-10:05 am

2 stops23h 30m

London Heathrow

Wed 11/18

9:00 am-11:21 pm

2 stops43h 21m

$742

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 11/16

2:05 pm-10:50 am

1 stop15h 45m

London Heathrow

Wed 11/18

9:00 am-11:21 pm

2 stops19h 21m

$743

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 11/11

6:30 am-9:40 pm

1 stop10h 10m

London Heathrow

Sun 11/15

7:45 am-11:43 pm

1 stop20h 58m

$848

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 10/26

6:30 am-9:40 pm

1 stop11h 10m

London Heathrow

Mon 11/2

8:05 am-11:43 pm

1 stop20h 38m

$848

Quickest round-trip

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 10/21

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Sat 11/7

12:20 pm-11:43 pm

1 stop16h 23m

$848

Flights are sorted by cheapest round-trip 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 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 $699.

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

You could potentially save up to 21% 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 round-trip 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

Best Price Found	$320
Fastest flight time	9h 40m
Direct flights	None

The best one-way flight to London from Portland, Maine in the past 72 hours is $320. The best round-trip flight deal from Portland, Maine to London found on momondo in the last 72 hours is $734.

The fastest flight from Portland, Maine to London takes 9h 40m

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?
London is 3183.1 mi away from Portland. Typically, this will take 9h 40m 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?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Portland Airport to London.
What documentation or ID do you need to fly to London?
The travel and health documents required for your trip to London can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Portland, Maine to London?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Portland, Maine to London is United Airlines (100% of total bookings).

Hounslow

Gatwick

Croydon

Hayes

Luton

Dover

Wembley

Milton Keynes

Kingston upon Thames

Richmond

Stansted

Watford

Harrow

Cobham

Worthing

Eastbourne

Slough

Hook

Ilford

Canterbury

Why use momondo?

Why should I use momondo to find a flight deal from Portland to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Portland to London for you.

Can I find flights from Portland to London with flexible booking policies on momondo?

Yes. All flights to London from Portland on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Portland to London?

Once all potential Portland to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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 $320

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 10/11. 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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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

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How to get the cheapest flight ticket from Portland, Maine to 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?

What 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

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Portland, Maine to London

Traveling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organize 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 favorite 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

Fly to other destinations from Portland, Maine

According to popular flight searches on momondo this year

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