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 43% of people opting to fly with this airline when traveling to United Kingdom. Keep in mind that there are 18 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?

United Airlines, Air Canada, and American 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 April 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.

$346 Cheap Flights from Portland to the United Kingdom in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize 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

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:35 pm - 9:20 am

PWM

EDI

13h 45m

1 stop

2:05 pm - 11:59 pm

EDI

PWM

14h 54m

1 stop

$729KLM

Tue, Sep 8 - Sat, Sep 19

6:25 am - 7:15 am

PWM

LHR

19h 50m

1 stop

6:15 am - 12:43 am

LHR

PWM

23h 28m

2 stops

$729Delta

Fri, May 8 - Wed, May 13

2:35 pm - 7:05 am

PWM

EDI

11h 30m

2 stops

2:05 pm - 11:59 pm

EDI

PWM

14h 54m

1 stop

$733Multiple Airlines

Tue, Sep 8 - Sat, Sep 19

2:35 pm - 7:05 am

PWM

EDI

11h 30m

2 stops

1:10 pm - 11:59 pm

EDI

PWM

15h 49m

2 stops

$764Multiple Airlines

Tue, Sep 8 - Sat, Sep 19

6:00 am - 6:25 am

PWM

LHR

19h 25m

1 stop

6:15 am - 10:23 pm

LHR

PWM

21h 08m

2 stops

$781Virgin Atlantic

Wed, Oct 14 - Wed, Oct 21

2:05 pm - 7:15 am

PWM

LHR

12h 10m

1 stop

9:20 am - 11:09 pm

LHR

PWM

18h 49m

1 stop

$806Virgin Atlantic

Thu, May 7 - Sat, May 30

10:04 am - 10:25 am

PWM

MAN

19h 21m

2 stops

9:00 am - 10:01 pm

MAN

PWM

42h 01m

2 stops

$942United Airlines

Wed, Aug 12 - Sun, Aug 30

7:35 pm - 10:10 am

PWM

GLA

33h 35m

2 stops

2:00 pm - 11:31 pm

GLA

PWM

14h 31m

1 stop

$1,057United Airlines

Mon, Sep 14 - Tue, Sep 22

11:56 am - 9:45 am

PWM

MAN

16h 49m

2 stops

8:00 am - 11:26 pm

MAN

PWM

20h 26m

2 stops

$1,160American Airlines

Thu, May 14 - Mon, May 18

6:54 pm - 8:15 pm

PWM

GLA

20h 21m

2 stops

8:35 am - 9:46 pm

GLA

PWM

18h 11m

2 stops

$1,311American Airlines

Fri, May 22 - Fri, May 29

Virgin Atlantic flights from Portland, Maine to United Kingdom

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

Virgin Atlantic

Oct 14

PWM6:00 amPortland

19h 25m

1 stop

LHR6:25 amLondon Heathrow

Oct 21

LHR6:15 amLondon Heathrow

21h 08m

2 stops

PWM10:23 pmPortland

$781

Virgin Atlantic

May 7

PWM2:05 pmPortland

12h 10m

1 stop

LHR7:15 amLondon Heathrow

May 30

LHR9:20 amLondon Heathrow

18h 49m

1 stop

PWM11:09 pmPortland

$806

Virgin Atlantic

Sep 30

PWM1:35 pmPortland

16h 45m

1 stop

LHR11:20 amLondon Heathrow

Oct 6

LHR6:15 amLondon Heathrow

21h 08m

2 stops

PWM10:23 pmPortland

$860

KLM flights from Portland, Maine to United Kingdom

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

KLM

May 2

PWM6:30 amPortland

19h 35m

1 stop

EDI7:05 amEdinburgh Turnhouse

May 11

EDI9:00 amEdinburgh Turnhouse

19h 09m

1 stop

PWM11:09 pmPortland

$712

KLM

Sep 8

PWM2:35 pmPortland

13h 45m

1 stop

EDI9:20 amEdinburgh Turnhouse

Sep 19

EDI2:05 pmEdinburgh Turnhouse

14h 54m

1 stop

PWM11:59 pmPortland

$729

KLM

May 8

PWM12:50 pmPortland

13h 20m

1 stop

LHR7:10 amLondon Heathrow

May 13

LHR11:15 amLondon Heathrow

16h 57m

1 stop

PWM11:12 pmPortland

$735

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 round-trip

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 9/8

2:35 pm-9:20 am

1 stop13h 45m

Edinburgh Turnhouse

Sat 9/19

2:05 pm-11:59 pm

1 stop14h 54m

$729

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 5/8

6:25 am-7:15 am

1 stop19h 50m

London Heathrow

Wed 5/13

6:15 am-12:43 am

2 stops23h 28m

$729

Quickest round-trip

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 9/8

2:35 pm-7:05 am

2 stops11h 30m

Edinburgh Turnhouse

Sat 9/19

2:05 pm-11:59 pm

1 stop14h 54m

$733

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 9/8

2:35 pm-7:05 am

2 stops11h 30m

Edinburgh Turnhouse

Sat 9/19

1:10 pm-11:59 pm

2 stops15h 49m

$764

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 10/14

6:00 am-6:25 am

1 stop19h 25m

London Heathrow

Wed 10/21

6:15 am-10:23 pm

2 stops21h 08m

$781

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 5/7

2:05 pm-7:15 am

1 stop12h 10m

London Heathrow

Sat 5/30

9:20 am-11:09 pm

1 stop18h 49m

$806

PortlandManchester

PWM - MAN

PWMMAN

Portland

Wed 8/12

10:04 am-10:25 am

2 stops19h 21m

Manchester

Sun 8/30

9:00 am-10:01 pm

2 stops42h 01m

$942

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Mon 9/14

7:35 pm-10:10 am

2 stops33h 35m

Glasgow Intl

Tue 9/22

2:00 pm-11:31 pm

1 stop14h 31m

$1,057

PortlandManchester

PWM - MAN

PWMMAN

Portland

Thu 5/14

11:56 am-9:45 am

2 stops16h 49m

Manchester

Mon 5/18

8:00 am-11:26 pm

2 stops20h 26m

$1,160

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Fri 5/22

6:54 pm-8:15 pm

2 stops20h 21m

Glasgow Intl

Fri 5/29

8:35 am-9:46 pm

2 stops18h 11m

$1,311

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 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, January 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 $0. If you aren’t able to travel to United Kingdom during the month of January, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $599.

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	11h 07m
Direct flights	None

The fastest flight from Portland, Maine to United Kingdom takes 11h 07m

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

Frequently asked questions about flying from Portland, Maine to the 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 April 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 9,675 reviews	Search United Airlines flights
American Airlines	PriceFrom $666	Free Cancellation	Rating 7.1 11,676 reviews	Search American Airlines flights
Delta	PriceFrom $689	Free Cancellation	Rating 7.9 8,466 reviews	Search Delta flights
KLM	PriceFrom $1,112	Free Cancellation	Rating 7.8 1,508 reviews	Search KLM 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.