What airlines fly to United Kingdom?

British Airways, Delta and JetBlue 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 47% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 19 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?

American Airlines, Air Canada, and United Airlines 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 many operators does momondo search for flights from Portland Airport to United Kingdom?

As of January 2026, there are 4 operators available to choose from for flights from Portland Airport to United Kingdom.

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 required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$506 Cheap Flights from Portland to the United Kingdom in 2026

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Find the cheapest flights from Portland, Maine to the United Kingdom

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:44 pm - 12:20 pm

PWM

EDI

19h 36m

2 stops

11:25 am - 11:55 pm

EDI

PWM

16h 30m

2 stops

$612American Airlines

Tue, Mar 10 - Tue, Mar 17

2:30 pm - 8:05 am

PWM

LHR

13h 35m

1 stop

11:45 am - 11:59 pm

LHR

PWM

16h 14m

2 stops

$624KLM

Mon, Mar 9 - Mon, Mar 16

7:00 am - 6:35 am

PWM

LHR

18h 35m

1 stop

7:50 am - 6:11 pm

LHR

PWM

15h 21m

2 stops

$628American Airlines

Mon, Feb 23 - Mon, Mar 2

2:30 pm - 9:20 am

PWM

LHR

14h 50m

1 stop

6:30 am - 11:59 pm

LHR

PWM

21h 29m

2 stops

$631Delta

Tue, Mar 10 - Tue, Mar 17

3:10 pm - 10:50 am

PWM

LHR

14h 40m

2 stops

11:10 am - 11:20 pm

LHR

PWM

17h 10m

2 stops

$635United Airlines

Mon, Feb 23 - Mon, Mar 2

12:51 pm - 11:40 am

PWM

LHR

18h 49m

2 stops

10:00 am - 11:59 pm

LHR

PWM

17h 59m

2 stops

$636Delta

Tue, Mar 10 - Tue, Mar 17

6:00 am - 8:45 pm

PWM

LHR

9h 45m

1 stop

11:55 am - 10:59 pm

LHR

PWM

16h 04m

1 stop

$656JetBlue

Tue, Mar 31 - Tue, Apr 14

2:18 pm - 9:20 am

PWM

EDI

14h 02m

1 stop

12:10 pm - 1:23 pm

EDI

PWM

30h 13m

1 stop

$721JetBlue

Wed, May 13 - Mon, May 18

2:51 pm - 8:55 am

PWM

MAN

37h 04m

2 stops

8:25 pm - 12:46 am

MAN

PWM

33h 21m

2 stops

$750Scandinavian Airlines

Thu, Apr 30 - Mon, May 4

6:04 am - 7:20 am

PWM

EDI

20h 16m

2 stops

9:00 am - 9:40 pm

EDI

PWM

17h 40m

2 stops

$754United Airlines

Tue, Apr 14 - Fri, Apr 24

Delta flights from Portland, Maine to United Kingdom

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

Delta

Mar 10

PWM2:30 pmPortland

14h 50m

1 stop

LHR9:20 amLondon Heathrow

Mar 17

LHR6:30 amLondon Heathrow

21h 29m

2 stops

PWM11:59 pmPortland

$631

Delta

Mar 10

PWM12:51 pmPortland

18h 49m

2 stops

LHR11:40 amLondon Heathrow

Mar 17

LHR10:00 amLondon Heathrow

17h 59m

2 stops

PWM11:59 pmPortland

$636

Delta

Mar 31

PWM2:30 pmPortland

13h 20m

1 stop

LHR8:50 amLondon Heathrow

Apr 14

LHR9:55 amLondon Heathrow

19h 51m

2 stops

PWM12:46 amPortland

$646

Air Canada flights from Portland, Maine to United Kingdom

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

Air Canada

Mar 10

PWM11:30 amPortland

17h 00m

3 stops

LHR8:30 amLondon Heathrow

Mar 17

LHR6:00 pmLondon Heathrow

23h 57m

3 stops

PWM1:57 pmPortland

$678

Air Canada

Feb 15

PWM6:00 amPortland

20h 10m

2 stops

LHR7:10 amLondon Heathrow

Feb 22

LHR1:25 pmLondon Heathrow

38h 55m

2 stops

PWM11:20 pmPortland

$692

Air Canada

Mar 31

PWM11:09 amPortland

17h 26m

3 stops

LHR9:35 amLondon Heathrow

Apr 14

LHR8:30 amLondon Heathrow

19h 58m

3 stops

PWM11:28 pmPortland

$794

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

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 3/10

12:44 pm-12:20 pm

2 stops19h 36m

Edinburgh Turnhouse

Tue 3/17

11:25 am-11:55 pm

2 stops16h 30m

$612

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 3/9

2:30 pm-8:05 am

1 stop13h 35m

London Heathrow

Mon 3/16

11:45 am-11:59 pm

2 stops16h 14m

$624

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 2/23

7:00 am-6:35 am

1 stop18h 35m

London Heathrow

Mon 3/2

7:50 am-6:11 pm

2 stops15h 21m

$628

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 3/10

2:30 pm-9:20 am

1 stop14h 50m

London Heathrow

Tue 3/17

6:30 am-11:59 pm

2 stops21h 29m

$631

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 2/23

3:10 pm-10:50 am

2 stops14h 40m

London Heathrow

Mon 3/2

11:10 am-11:20 pm

2 stops17h 10m

$635

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 3/10

12:51 pm-11:40 am

2 stops18h 49m

London Heathrow

Tue 3/17

10:00 am-11:59 pm

2 stops17h 59m

$636

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 3/31

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Tue 4/14

11:55 am-10:59 pm

1 stop16h 04m

$656

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 5/13

2:18 pm-9:20 am

1 stop14h 02m

Edinburgh Turnhouse

Mon 5/18

12:10 pm-1:23 pm

1 stop30h 13m

$721

PortlandManchester

PWM - MAN

PWMMAN

Portland

Thu 4/30

2:51 pm-8:55 am

2 stops37h 04m

Manchester

Mon 5/4

8:25 pm-12:46 am

2 stops33h 21m

$750

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 4/14

6:04 am-7:20 am

2 stops20h 16m

Edinburgh Turnhouse

Fri 4/24

9:00 am-9:40 pm

2 stops17h 40m

$754

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 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

What is the cheapest month to fly to United Kingdom?

In general, October is the cheapest month to fly from Portland, Maine to United Kingdom. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $599. If you aren’t able to travel to United Kingdom during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $673.

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

You could potentially save up to 21% 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	10h 36m
Direct flights	None

The fastest flight from Portland, Maine to United Kingdom takes 10h 36m

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 many operators does momondo search for flights from Portland Airport to United Kingdom?
As of January 2026, there are 4 operators available to choose from for flights from Portland Airport to United Kingdom.
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 required travel and health documents for your United Kingdom trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at United Kingdom. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Portland, Maine to United Kingdom

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $648	Free Cancellation	Rating 7.4 9,198 reviews	Search United Airlines flights
American Airlines	PriceFrom $679	Free Cancellation	Rating 7.2 11,192 reviews	Search American Airlines flights
Delta	PriceFrom $683	Free Cancellation	Rating 7.9 8,112 reviews	Search Delta flights
JetBlue	PriceFrom $695	Free Cancellation	Rating 7.2 2,895 reviews	Search JetBlue flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to United Kingdom. momondo saves you time and could save you money on your trip.

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

Yes. momondo enables you to select and highlight flights to United Kingdom from Portland with this policy.

How can momondo help me find flights from Portland to United Kingdom?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to United Kingdom from Portland.

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.