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?

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

As of June 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.

$310 Cheap Flights from Portland, Maine to the United Kingdom in 2026

Discover deals from 900+ travel sites with momondo.

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.

6:00 am - 9:20 pm

PWM

LHR

10h 20m

1 stop

1:50 pm - 11:28 pm

LHR

PWM

14h 38m

2 stops

$814United Airlines

Thu, Oct 15 - Fri, Oct 16

6:00 am - 8:45 pm

PWM

LHR

9h 45m

1 stop

11:55 am - 12:14 am

LHR

PWM

17h 19m

1 stop

$826JetBlue

Mon, Aug 3 - Wed, Aug 26

6:00 am - 8:45 pm

PWM

LHR

9h 45m

1 stop

8:15 am - 12:14 am

LHR

PWM

20h 59m

1 stop

$855JetBlue

Fri, Aug 7 - Fri, Aug 21

5:42 pm - 4:35 pm

PWM

EDI

17h 53m

2 stops

11:25 am - 5:17 pm

EDI

PWM

10h 52m

1 stop

$859American Airlines

Mon, Sep 14 - Tue, Sep 22

5:42 pm - 4:35 pm

PWM

EDI

17h 53m

2 stops

11:25 am - 5:17 pm

EDI

PWM

10h 52m

1 stop

$860American Airlines

Mon, Sep 14 - Tue, Sep 22

2:35 pm - 9:20 am

PWM

EDI

13h 45m

1 stop

2:05 pm - 11:59 pm

EDI

PWM

14h 54m

1 stop

$866Delta

Mon, Sep 14 - Tue, Sep 22

4:48 pm - 7:55 am

PWM

LHR

34h 07m

1 stop

6:50 am - 4:09 pm

LHR

PWM

14h 19m

2 stops

$868Brussels Airlines

Sat, Nov 21 - Tue, Nov 24

6:00 am - 9:35 am

PWM

LHR

22h 35m

2 stops

7:05 am - 11:59 pm

LHR

PWM

21h 54m

2 stops

$869Scandinavian Airlines

Thu, Aug 20 - Fri, Sep 11

2:35 pm - 9:20 am

PWM

EDI

13h 45m

1 stop

2:05 pm - 11:59 pm

EDI

PWM

14h 54m

1 stop

$871Delta

Mon, Sep 14 - Tue, Sep 22

2:35 pm - 4:00 pm

PWM

LHR

20h 25m

2 stops

6:40 am - 11:49 pm

LHR

PWM

22h 09m

2 stops

$880Scandinavian Airlines

Thu, Oct 1 - Thu, Oct 15

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United Airlines flights from Portland, Maine to United Kingdom

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

United Airlines

Oct 15

PWM6:00 amPortland

10h 20m

1 stop

LHR9:20 pmLondon Heathrow

Oct 16

LHR1:50 pmLondon Heathrow

14h 38m

2 stops

PWM11:28 pmPortland

$814

United Airlines

Nov 10

PWM5:06 pmPortland

12h 19m

1 stop

LHR10:25 amLondon Heathrow

Nov 24

LHR6:50 amLondon Heathrow

14h 19m

2 stops

PWM4:09 pmPortland

$887

United Airlines

Nov 10

PWM5:06 pmPortland

12h 19m

1 stop

LHR10:25 amLondon Heathrow

Nov 24

LHR6:50 amLondon Heathrow

14h 19m

2 stops

PWM4:09 pmPortland

$888

JetBlue flights from Portland, Maine to United Kingdom

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

JetBlue

Aug 3

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Aug 26

LHR11:55 amLondon Heathrow

17h 19m

1 stop

PWM12:14 amPortland

$826

JetBlue

Aug 7

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Aug 21

LHR8:15 amLondon Heathrow

20h 59m

1 stop

PWM12:14 amPortland

$855

JetBlue

Aug 21

PWM2:49 pmPortland

13h 31m

1 stop

EDI9:20 amEdinburgh Turnhouse

Sep 11

EDI12:10 pmEdinburgh Turnhouse

16h 42m

1 stop

PWM11:52 pmPortland

$872

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

Quickest round-trip

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 10/15

6:00 am-9:20 pm

1 stop10h 20m

London Heathrow

Fri 10/16

1:50 pm-11:28 pm

2 stops14h 38m

$814

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 8/3

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Wed 8/26

11:55 am-12:14 am

1 stop17h 19m

$826

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 8/7

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Fri 8/21

8:15 am-12:14 am

1 stop20h 59m

$855

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Mon 9/14

5:42 pm-4:35 pm

2 stops17h 53m

Edinburgh Turnhouse

Tue 9/22

11:25 am-5:17 pm

1 stop10h 52m

$859

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Mon 9/14

5:42 pm-4:35 pm

2 stops17h 53m

Edinburgh Turnhouse

Tue 9/22

11:25 am-5:17 pm

1 stop10h 52m

$860

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Mon 9/14

2:35 pm-9:20 am

1 stop13h 45m

Edinburgh Turnhouse

Tue 9/22

2:05 pm-11:59 pm

1 stop14h 54m

$866

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sat 11/21

4:48 pm-7:55 am

1 stop34h 07m

London Heathrow

Tue 11/24

6:50 am-4:09 pm

2 stops14h 19m

$868

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 8/20

6:00 am-9:35 am

2 stops22h 35m

London Heathrow

Fri 9/11

7:05 am-11:59 pm

2 stops21h 54m

$869

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Mon 9/14

2:35 pm-9:20 am

1 stop13h 45m

Edinburgh Turnhouse

Tue 9/22

2:05 pm-11:59 pm

1 stop14h 54m

$871

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 10/1

2:35 pm-4:00 pm

2 stops20h 25m

London Heathrow

Thu 10/15

6:40 am-11:49 pm

2 stops22h 09m

$880

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

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

You could potentially save up to 10% 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 20m
Direct flights	None

The fastest flight from Portland, Maine to United Kingdom takes 10h 20m

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 June 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
American Airlines	PriceFrom $666	Free Cancellation	Rating 7.1 11,664 reviews	Search American Airlines flights
Delta	PriceFrom $689	Free Cancellation	Rating 7.9 8,401 reviews	Search Delta flights
United Airlines	PriceFrom $762	Free Cancellation	Rating 7.4 9,824 reviews	Search United Airlines flights
KLM	PriceFrom $1,112	Free Cancellation	Rating 7.8 1,528 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.