Which airlines fly to United Kingdom?

British Airways, Virgin Atlantic and Aer Lingus are the top three most popular airlines that fly to United Kingdom from Portland, Maine according to our data. British Airways is the first choice among our users, with 31% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 11 different airlines that fly to United Kingdom on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to United Kingdom?

JetBlue, Delta, and Air Canada are the most popular carriers operating from Portland to United Kingdom

When did momondo last update prices for flights from Portland Airport to United Kingdom?

Prices for flights from Portland Airport to United Kingdom refresh daily.

How old do you have to be to fly from Portland Airport to United Kingdom?

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 United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

£282 Cheap Flights from Portland to the United Kingdom in 2026

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 the United Kingdom

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

09:15 - 08:40

PWM

LHR

18h 25m

2 stops

14:10 - 23:59

LHR

PWM

14h 49m

2 stops

£526United Airlines

Tue, 11 Aug - Wed, 12 Aug

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

11:55 - 23:36

LHR

PWM

16h 41m

1 stop

£550JetBlue

Wed, 6 May - Mon, 11 May

06:00 - 20:45

PWM

LHR

9h 45m

1 stop

11:55 - 23:36

LHR

PWM

16h 41m

1 stop

£550JetBlue

Wed, 13 May - Tue, 19 May

06:30 - 06:45

PWM

LHR

19h 15m

1 stop

08:40 - 23:59

LHR

PWM

20h 19m

2 stops

£572Delta

Tue, 1 Sep - Fri, 4 Sep

12:50 - 09:15

PWM

LHR

15h 25m

2 stops

09:55 - 23:59

LHR

PWM

19h 04m

2 stops

£575Delta

Tue, 1 Sep - Thu, 3 Sep

19:23 - 16:30

PWM

EDI

16h 07m

2 stops

10:30 - 22:13

EDI

PWM

16h 43m

2 stops

£577American Airlines

Tue, 21 Apr - Tue, 28 Apr

14:51 - 07:05

PWM

EDI

11h 14m

1 stop

14:05 - 00:46

EDI

PWM

15h 41m

1 stop

£580KLM

Tue, 21 Apr - Tue, 28 Apr

15:02 - 11:55

PWM

EDI

15h 53m

2 stops

10:25 - 23:27

EDI

PWM

18h 02m

2 stops

£583Multiple Airlines

Wed, 8 Apr - Wed, 15 Apr

15:02 - 13:25

PWM

GLA

17h 23m

2 stops

05:50 - 17:31

GLA

PWM

16h 41m

2 stops

£617American Airlines

Mon, 13 Apr - Fri, 24 Apr

17:16 - 13:10

PWM

MAN

14h 54m

2 stops

08:35 - 23:24

MAN

PWM

19h 49m

2 stops

£629Multiple Airlines

Wed, 26 Aug - Tue, 1 Sep

United Airlines flights from Portland, Maine to United Kingdom

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

United Airlines

11 Aug

PWM09:15Portland

18h 25m

2 stops

LHR08:40London Heathrow

12 Aug

LHR14:10London Heathrow

14h 49m

2 stops

PWM23:59Portland

£526

United Airlines

27 Aug

PWM06:00Portland

21h 25m

1 stop

EDI08:25Edinburgh Turnhouse

9 Sept

EDI12:30Edinburgh Turnhouse

16h 29m

1 stop

PWM23:59Portland

£575

United Airlines

27 Aug

PWM06:00Portland

21h 25m

1 stop

EDI08:25Edinburgh Turnhouse

9 Sept

EDI09:40Edinburgh Turnhouse

19h 19m

2 stops

PWM23:59Portland

£579

Delta flights from Portland, Maine to United Kingdom

Our best Delta deals on Portland, Maine to United Kingdom flight tickets

Delta

1 Sept

PWM06:30Portland

19h 15m

1 stop

LHR06:45London Heathrow

4 Sept

LHR08:40London Heathrow

20h 19m

2 stops

PWM23:59Portland

£572

Delta

1 Sept

PWM12:50Portland

15h 25m

2 stops

LHR09:15London Heathrow

3 Sept

LHR09:55London Heathrow

19h 04m

2 stops

PWM23:59Portland

£575

Delta

1 Sept

PWM12:50Portland

15h 25m

2 stops

LHR09:15London Heathrow

4 Sept

LHR08:40London Heathrow

20h 19m

2 stops

PWM23:59Portland

£576

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 11/8

09:15-08:40

2 stops18h 25m

London Heathrow

Wed 12/8

14:10-23:59

2 stops14h 49m

£526

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 6/5

06:00-20:45

1 stop9h 45m

London Heathrow

Mon 11/5

11:55-23:36

1 stop16h 41m

£550

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 13/5

06:00-20:45

1 stop9h 45m

London Heathrow

Tue 19/5

11:55-23:36

1 stop16h 41m

£550

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 1/9

06:30-06:45

1 stop19h 15m

London Heathrow

Fri 4/9

08:40-23:59

2 stops20h 19m

£572

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 1/9

12:50-09:15

2 stops15h 25m

London Heathrow

Thu 3/9

09:55-23:59

2 stops19h 04m

£575

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 21/4

19:23-16:30

2 stops16h 07m

Edinburgh Turnhouse

Tue 28/4

10:30-22:13

2 stops16h 43m

£577

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 21/4

14:51-07:05

1 stop11h 14m

Edinburgh Turnhouse

Tue 28/4

14:05-00:46

1 stop15h 41m

£580

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 8/4

15:02-11:55

2 stops15h 53m

Edinburgh Turnhouse

Wed 15/4

10:25-23:27

2 stops18h 02m

£583

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Mon 13/4

15:02-13:25

2 stops17h 23m

Glasgow Intl

Fri 24/4

05:50-17:31

2 stops16h 41m

£617

PortlandManchester

PWM - MAN

PWMMAN

Portland

Wed 26/8

17:16-13:10

2 stops14h 54m

Manchester

Tue 1/9

08:35-23:24

2 stops19h 49m

£629

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 United Kingdom

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

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

You could potentially save up to 24% on your flight if you consider stops on a Portland, Maine to United Kingdom flight.

Cheap Portland, Maine to United Kingdom flight deals and tips

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

Fastest flight time	9h 45m
Direct flights	None

The fastest flight from Portland, Maine to United Kingdom takes 9h 45m

There are no direct flights from Portland, Maine to United Kingdom. There are no popular flight routes from Portland, Maine to United Kingdom.

Search flight deals

When did momondo last update prices for flights from Portland Airport to United Kingdom?
Prices for flights from Portland Airport to United Kingdom refresh daily.
How old do you have to be to fly from Portland Airport to United Kingdom?
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 United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The travel and health documents required for your trip to United Kingdom 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 United Kingdom. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Portland to United Kingdom . Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to United Kingdom 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 United Kingdom?

Once you have performed a search for Portland to United Kingdom flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Portland to United Kingdom right now. Can momondo alert me if prices change?

If you are simply researching potential flights to United Kingdom, momondo offers a useful price alert feature which will track prices for flights to United Kingdom from Portland and alert you when they change.