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 39% 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?

KLM, Delta, and American Airlines 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.

£193 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 £811 to £602. The lowest price recently found on this route was £551.

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

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

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.

05:21 - 06:25

PWM

LHR

20h 04m

1 stop

13:25 - 23:23

LHR

PWM

14h 58m

1 stop

£551Virgin Atlantic

Mon, 27 Apr - Fri, 1 May

12:50 - 10:20

PWM

LHR

16h 30m

2 stops

11:45 - 00:43

LHR

PWM

17h 58m

2 stops

£555Delta

Thu, 7 May - Sun, 10 May

12:46 - 07:10

PWM

LHR

13h 24m

1 stop

08:40 - 23:09

LHR

PWM

19h 29m

2 stops

£555Delta

Thu, 30 Apr - Fri, 15 May

06:00 - 06:25

PWM

LHR

19h 25m

1 stop

13:25 - 23:09

LHR

PWM

14h 44m

1 stop

£556Virgin Atlantic

Thu, 7 May - Sun, 10 May

14:38 - 07:15

PWM

LHR

11h 37m

1 stop

09:55 - 23:12

LHR

PWM

18h 17m

2 stops

£557Delta

Fri, 8 May - Wed, 13 May

14:38 - 07:15

PWM

LHR

11h 37m

1 stop

11:45 - 00:43

LHR

PWM

17h 58m

2 stops

£558Delta

Thu, 7 May - Sun, 10 May

14:38 - 08:50

PWM

LHR

13h 12m

1 stop

06:30 - 00:43

LHR

PWM

23h 13m

2 stops

£558Delta

Sun, 10 May - Sat, 16 May

14:51 - 09:40

PWM

LGW

13h 49m

2 stops

17:00 - 14:11

LGW

PWM

26h 11m

2 stops

£567Air France

Mon, 27 Apr - Fri, 1 May

17:09 - 10:00

PWM

LGW

35h 51m

2 stops

14:00 - 09:08

LGW

PWM

24h 08m

1 stop

£722Multiple Airlines

Tue, 22 Sep - Sun, 4 Oct

07:20 - 08:35

PWM

LCY

20h 15m

2 stops

13:45 - 23:03

LCY

PWM

14h 18m

2 stops

£987Multiple Airlines

Wed, 13 May - Wed, 20 May

Delta flights from Portland, Maine to London

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

Delta

7 May

PWM12:50Portland

16h 30m

2 stops

LHR10:20London Heathrow

10 May

LHR11:45London Heathrow

17h 58m

2 stops

PWM00:43Portland

£555

Delta

30 Apr

PWM12:46Portland

13h 24m

1 stop

LHR07:10London Heathrow

15 May

LHR08:40London Heathrow

19h 29m

2 stops

PWM23:09Portland

£555

Delta

8 May

PWM14:38Portland

11h 37m

1 stop

LHR07:15London Heathrow

13 May

LHR09:55London Heathrow

18h 17m

2 stops

PWM23:12Portland

£557

United Airlines flights from Portland, Maine to London

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

United Airlines

8 May

PWM06:00Portland

10h 25m

1 stop

LHR21:25London Heathrow

15 May

LHR06:50London Heathrow

19h 29m

2 stops

PWM21:19Portland

£688

United Airlines

7 May

PWM06:00Portland

23h 00m

2 stops

LHR10:00London Heathrow

14 May

LHR07:25London Heathrow

31h 53m

2 stops

PWM10:18Portland

£695

United Airlines

15 Apr

PWM06:00Portland

10h 25m

1 stop

LHR21:25London Heathrow

18 Apr

LHR14:05London Heathrow

33h 53m

2 stops

PWM18:58Portland

£734

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 27/4

05:21-06:25

1 stop20h 04m

London Heathrow

Fri 1/5

13:25-23:23

1 stop14h 58m

£551

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 7/5

12:50-10:20

2 stops16h 30m

London Heathrow

Sun 10/5

11:45-00:43

2 stops17h 58m

£555

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 30/4

12:46-07:10

1 stop13h 24m

London Heathrow

Fri 15/5

08:40-23:09

2 stops19h 29m

£555

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 7/5

06:00-06:25

1 stop19h 25m

London Heathrow

Sun 10/5

13:25-23:09

1 stop14h 44m

£556

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/5

14:38-07:15

1 stop11h 37m

London Heathrow

Wed 13/5

09:55-23:12

2 stops18h 17m

£557

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 7/5

14:38-07:15

1 stop11h 37m

London Heathrow

Sun 10/5

11:45-00:43

2 stops17h 58m

£558

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 10/5

14:38-08:50

1 stop13h 12m

London Heathrow

Sat 16/5

06:30-00:43

2 stops23h 13m

£558

PortlandLondon

PWM - LGW

PWMLGW

Portland

Mon 27/4

14:51-09:40

2 stops13h 49m

London Gatwick

Fri 1/5

17:00-14:11

2 stops26h 11m

£567

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 22/9

17:09-10:00

2 stops35h 51m

London Gatwick

Sun 4/10

14:00-09:08

1 stop24h 08m

£722

PortlandLondon

PWM - LCY

PWMLCY

Portland

Wed 13/5

07:20-08:35

2 stops20h 15m

London City

Wed 20/5

13:45-23:03

2 stops14h 18m

£987

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?

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 27m
Direct flights	None

The fastest flight from Portland, Maine to London takes 10h 27m

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 27m 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

Luton

Gatwick

Slough

Maidstone

Wembley

Southend-on-Sea

Ipswich

Canterbury

Ilford

Guildford

Hayes

Dover

Chelmsford

Folkestone

Bedford

Ramsgate

Chichester

Harlow

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

Thu 14/5

Thu 21/5

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 £193

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 9/5. 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

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Portland, Maine to London

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

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

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 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

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year