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

Delta, United Airlines, and Scandinavian Airlines 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 51% of people opting to fly with this airline when traveling to London. Keep in mind that there are 18 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 many operators does momondo search for flights from Portland Airport to London?

There is 1 operator available for flights from Portland Airport to London as of March 2026.

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.

$305 Cheap Flights from Portland 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 $786 to $918. The lowest price recently found on this route was $708.

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:00 am - 9:35 pm

PWM

LHR

10h 35m

1 stop

5:50 pm - 5:44 pm

LHR

PWM

28h 54m

2 stops

$708United Airlines

Mon, Aug 24 - Tue, Aug 25

3:44 pm - 10:40 am

PWM

LHR

13h 56m

2 stops

5:50 pm - 5:44 pm

LHR

PWM

28h 54m

2 stops

$713United Airlines

Mon, Aug 24 - Tue, Aug 25

2:51 pm - 4:00 pm

PWM

LHR

20h 09m

2 stops

7:05 am - 12:43 am

LHR

PWM

22h 38m

2 stops

$795Scandinavian Airlines

Mon, May 4 - Mon, May 11

6:00 am - 1:10 pm

PWM

LGW

26h 10m

2 stops

7:05 am - 11:36 pm

LGW

PWM

21h 31m

2 stops

$807Turkish Airlines

Fri, May 8 - Wed, May 13

7:20 am - 4:40 pm

PWM

LGW

28h 20m

2 stops

5:35 pm - 11:03 pm

LGW

PWM

34h 28m

2 stops

$833Turkish Airlines

Wed, May 6 - Mon, May 11

6:00 am - 9:30 am

PWM

LHR

22h 30m

1 stop

8:15 am - 11:36 pm

LHR

PWM

20h 21m

1 stop

$834JetBlue

Mon, May 4 - Mon, May 11

6:00 am - 9:30 am

PWM

LHR

22h 30m

1 stop

8:15 am - 11:36 pm

LHR

PWM

20h 21m

1 stop

$835JetBlue

Mon, May 4 - Mon, May 11

2:51 pm - 9:40 pm

PWM

LHR

25h 49m

2 stops

7:05 am - 12:43 am

LHR

PWM

22h 38m

2 stops

$842Scandinavian Airlines

Mon, May 4 - Mon, May 11

2:35 pm - 12:05 pm

PWM

LHR

16h 30m

1 stop

9:55 am - 11:59 pm

LHR

PWM

19h 04m

2 stops

$855Delta

Sun, Aug 23 - Fri, Sep 4

11:38 am - 9:25 am

PWM

LGW

16h 47m

2 stops

10:25 am - 11:59 pm

LGW

PWM

18h 34m

2 stops

$945Delta

Tue, Aug 25 - Mon, Sep 7

Scandinavian Airlines flights from Portland, Maine to London

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

Scandinavian Airlines

May 4

PWM2:51 pmPortland

20h 09m

2 stops

LHR4:00 pmLondon Heathrow

May 11

LHR7:05 amLondon Heathrow

22h 38m

2 stops

PWM12:43 amPortland

$795

Scandinavian Airlines

May 4

PWM2:51 pmPortland

25h 49m

2 stops

LHR9:40 pmLondon Heathrow

May 11

LHR7:05 amLondon Heathrow

22h 38m

2 stops

PWM12:43 amPortland

$842

JetBlue flights from Portland, Maine to London

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

JetBlue

May 4

PWM6:00 amPortland

22h 30m

1 stop

LHR9:30 amLondon Heathrow

May 11

LHR8:15 amLondon Heathrow

20h 21m

1 stop

PWM11:36 pmPortland

$834

JetBlue

May 4

PWM6:00 amPortland

22h 30m

1 stop

LHR9:30 amLondon Heathrow

May 11

LHR8:15 amLondon Heathrow

20h 21m

1 stop

PWM11:36 pmPortland

$835

JetBlue

Apr 1

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Apr 8

LHR11:55 amLondon Heathrow

17h 03m

1 stop

PWM11:58 pmPortland

$838

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 8/24

6:00 am-9:35 pm

1 stop10h 35m

London Heathrow

Tue 8/25

5:50 pm-5:44 pm

2 stops28h 54m

$708

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 8/24

3:44 pm-10:40 am

2 stops13h 56m

London Heathrow

Tue 8/25

5:50 pm-5:44 pm

2 stops28h 54m

$713

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/4

2:51 pm-4:00 pm

2 stops20h 09m

London Heathrow

Mon 5/11

7:05 am-12:43 am

2 stops22h 38m

$795

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 5/8

6:00 am-1:10 pm

2 stops26h 10m

London Gatwick

Wed 5/13

7:05 am-11:36 pm

2 stops21h 31m

$807

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 5/6

7:20 am-4:40 pm

2 stops28h 20m

London Gatwick

Mon 5/11

5:35 pm-11:03 pm

2 stops34h 28m

$833

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/4

6:00 am-9:30 am

1 stop22h 30m

London Heathrow

Mon 5/11

8:15 am-11:36 pm

1 stop20h 21m

$834

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/4

6:00 am-9:30 am

1 stop22h 30m

London Heathrow

Mon 5/11

8:15 am-11:36 pm

1 stop20h 21m

$835

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 5/4

2:51 pm-9:40 pm

2 stops25h 49m

London Heathrow

Mon 5/11

7:05 am-12:43 am

2 stops22h 38m

$842

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 8/23

2:35 pm-12:05 pm

1 stop16h 30m

London Heathrow

Fri 9/4

9:55 am-11:59 pm

2 stops19h 04m

$855

Quickest round-trip

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 8/25

11:38 am-9:25 am

2 stops16h 47m

London Gatwick

Mon 9/7

10:25 am-11:59 pm

2 stops18h 34m

$945

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 typical price of a round-trip flight between Portland, Maine and London?

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

Fastest flight time	9h 40m
Direct flights	None

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

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 many operators does momondo search for flights from Portland Airport to London?
There is 1 operator available for flights from Portland Airport to London as of March 2026.
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 (60% of total bookings). The next most popular airline is American Airlines (40%).

Best airlines flying from Portland, Maine to London

Compare and see reviews for airlines that fly from Portland, Maine to London with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $648	Free Cancellation	Rating 7.4 9,469 reviews		Search United Airlines flights

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Crawley

Slough

Wembley

Hayes

Croydon

Dartford

Brentwood

Guildford

Harrow

Cobham

Folkestone

Romford

Stansted

Watford

Richmond

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 $305

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 8/24. 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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Scandinavian Airlines flights from Portland, Maine to London

Our best Scandinavian 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 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

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

Fastest flight time

Direct flights

Best airlines flying from Portland, Maine to London

Compare and see reviews for airlines that fly from Portland, Maine to London with momondo

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

Complete your trip to London

Explore popular destinations other users love

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