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

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

What airlines fly to United Kingdom?

British Airways, Aer Lingus and Delta 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 41% 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.

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 July 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.

$326 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.

8:45 am - 8:25 am

PWM

LHR

18h 40m

1 stop

6:50 am - 11:21 pm

LHR

PWM

21h 31m

2 stops

$738United Airlines

Mon, Nov 9 - Wed, Nov 11

3:10 pm - 10:05 am

PWM

LHR

13h 55m

2 stops

7:40 am - 6:52 pm

LHR

PWM

16h 12m

2 stops

$765United Airlines

Mon, Nov 9 - Wed, Nov 11

3:10 pm - 10:05 am

PWM

LHR

13h 55m

2 stops

9:10 am - 9:51 pm

LHR

PWM

17h 41m

2 stops

$765United Airlines

Mon, Nov 9 - Wed, Nov 11

2:40 pm - 9:20 am

PWM

EDI

13h 40m

1 stop

12:10 pm - 12:25 am

EDI

PWM

17h 15m

1 stop

$784JetBlue

Wed, Aug 26 - Wed, Sep 2

6:00 am - 8:45 pm

PWM

LHR

9h 45m

1 stop

8:15 am - 12:10 am

LHR

PWM

20h 55m

1 stop

$791JetBlue

Sun, Sep 6 - Tue, Sep 8

4:47 pm - 3:45 pm

PWM

LGW

17h 58m

2 stops

10:00 am - 11:55 pm

LGW

PWM

18h 55m

2 stops

$875Delta

Tue, Nov 3 - Thu, Nov 12

6:00 pm - 5:50 pm

PWM

GLA

18h 50m

2 stops

7:30 am - 9:56 pm

GLA

PWM

19h 26m

2 stops

$929American Airlines

Wed, Sep 9 - Wed, Sep 16

4:54 pm - 9:05 am

PWM

EDI

12h 11m

1 stop

11:05 am - 10:57 pm

EDI

PWM

16h 52m

1 stop

$970American Airlines

Sat, Oct 31 - Mon, Nov 9

4:03 pm - 9:30 am

PWM

LCY

12h 27m

2 stops

10:00 am - 11:55 pm

LCY

PWM

18h 55m

2 stops

$985Delta

Fri, Nov 27 - Mon, Nov 30

4:20 pm - 9:30 am

PWM

LCY

12h 10m

2 stops

8:25 am - 9:00 pm

LCY

PWM

41h 35m

2 stops

$1,203KLM

Fri, Sep 11 - Fri, Sep 18

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JetBlue flights from Portland, Maine to United Kingdom

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

JetBlue

Aug 26

PWM2:40 pmPortland

13h 40m

1 stop

EDI9:20 amEdinburgh Turnhouse

Sep 2

EDI12:10 pmEdinburgh Turnhouse

17h 15m

1 stop

PWM12:25 amPortland

$784

JetBlue

Sep 6

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Sep 8

LHR8:15 amLondon Heathrow

20h 55m

1 stop

PWM12:10 amPortland

$791

JetBlue

Sep 6

PWM6:00 amPortland

9h 45m

1 stop

LHR8:45 pmLondon Heathrow

Sep 8

LHR8:15 amLondon Heathrow

20h 55m

1 stop

PWM12:10 amPortland

$792

Air Canada flights from Portland, Maine to United Kingdom

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

Air Canada

Nov 10

PWM8:45 amPortland

18h 45m

3 stops

LHR8:30 amLondon Heathrow

Nov 17

LHR9:00 amLondon Heathrow

19h 21m

3 stops

PWM11:21 pmPortland

$880

Air Canada

Nov 10

PWM8:45 amPortland

18h 45m

3 stops

LHR8:30 amLondon Heathrow

Nov 24

LHR6:00 amLondon Heathrow

22h 21m

3 stops

PWM11:21 pmPortland

$884

Air Canada

Oct 6

PWM6:00 amPortland

20h 20m

2 stops

EDI7:20 amEdinburgh Turnhouse

Oct 17

EDI9:00 amEdinburgh Turnhouse

43h 28m

2 stops

PWM11:28 pmPortland

$973

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

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/9

8:45 am-8:25 am

1 stop18h 40m

London Heathrow

Wed 11/11

6:50 am-11:21 pm

2 stops21h 31m

$738

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/9

3:10 pm-10:05 am

2 stops13h 55m

London Heathrow

Wed 11/11

7:40 am-6:52 pm

2 stops16h 12m

$765

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 11/9

3:10 pm-10:05 am

2 stops13h 55m

London Heathrow

Wed 11/11

9:10 am-9:51 pm

2 stops17h 41m

$765

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Wed 8/26

2:40 pm-9:20 am

1 stop13h 40m

Edinburgh Turnhouse

Wed 9/2

12:10 pm-12:25 am

1 stop17h 15m

$784

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 9/6

6:00 am-8:45 pm

1 stop9h 45m

London Heathrow

Tue 9/8

8:15 am-12:10 am

1 stop20h 55m

$791

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 11/3

4:47 pm-3:45 pm

2 stops17h 58m

London Gatwick

Thu 11/12

10:00 am-11:55 pm

2 stops18h 55m

$875

PortlandGlasgow

PWM - GLA

PWMGLA

Portland

Wed 9/9

6:00 pm-5:50 pm

2 stops18h 50m

Glasgow Intl

Wed 9/16

7:30 am-9:56 pm

2 stops19h 26m

$929

Quickest round-trip

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Sat 10/31

4:54 pm-9:05 am

1 stop12h 11m

Edinburgh Turnhouse

Mon 11/9

11:05 am-10:57 pm

1 stop16h 52m

$970

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 11/27

4:03 pm-9:30 am

2 stops12h 27m

London City

Mon 11/30

10:00 am-11:55 pm

2 stops18h 55m

$985

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 9/11

4:20 pm-9:30 am

2 stops12h 10m

London City

Fri 9/18

8:25 am-9:00 pm

2 stops41h 35m

$1,203

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 December is also cheap. Prices for this month can be found on momondo for an average of $699.

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

You could potentially save up to 13% 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 40m
Direct flights	None

The fastest flight from Portland, Maine to United Kingdom takes 9h 40m

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 July 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 11,841 reviews	Search American Airlines flights
Delta	PriceFrom $689	Free Cancellation	Rating 7.8 8,490 reviews	Search Delta flights
United Airlines	PriceFrom $752	Free Cancellation	Rating 7.4 10,046 reviews	Search United Airlines flights
KLM	PriceFrom $1,112	Free Cancellation	Rating 7.8 1,551 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.