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

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

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 35% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 8 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 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.

£237 Cheap Flights from Portland, Maine to the United Kingdom in 2026

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

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:04 - 06:20PWM Portland-LHR London Heathrow

19h 16m1 stop New York John F Kennedy Intl

11:30 - 00:10LHR London Heathrow-PWM Portland

17h 40m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£546Delta

Wed, 7 Oct - Wed, 14 Oct

16:03 - 08:35PWM Portland-LHR London Heathrow

11h 32m1 stop New York John F Kennedy Intl

08:55 - 00:21LHR London Heathrow-PWM Portland

20h 26m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£546Delta

Tue, 24 Nov - Thu, 3 Dec

14:05 - 09:00PWM Portland-LHR London Heathrow

13h 55m1 stop Atlanta Hartsfield-Jackson

08:55 - 00:19LHR London Heathrow-PWM Portland

20h 24m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£546Delta

Tue, 10 Nov - Tue, 24 Nov

12:45 - 06:50PWM Portland-LHR London Heathrow

13h 05m1 stop Detroit Metropolitan Wayne County

06:30 - 00:19LHR London Heathrow-PWM Portland

22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£546Delta

Tue, 10 Nov - Tue, 17 Nov

06:00 - 06:25PWM Portland-LHR London Heathrow

19h 25m1 stop Atlanta Hartsfield-Jackson

08:55 - 00:19LHR London Heathrow-PWM Portland

20h 24m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£546Delta

Tue, 10 Nov - Tue, 24 Nov

06:00 - 06:20PWM Portland-LHR London Heathrow

19h 20m1 stop New York John F Kennedy Intl

08:55 - 00:19LHR London Heathrow-PWM Portland

20h 24m2 stops Paris Charles de Gaulle New York John F Kennedy Intl

£546Delta

Tue, 10 Nov - Tue, 17 Nov

16:15 - 10:30PWM Portland-LHR London Heathrow

13h 15m1 stop New York John F Kennedy Intl

11:45 - 00:19LHR London Heathrow-PWM Portland

17h 34m2 stops Amsterdam Schiphol New York John F Kennedy Intl

£547Multiple Airlines

Wed, 4 Nov - Thu, 12 Nov

08:49 - 09:10PWM Portland-LHR London Heathrow

19h 21m1 stop Newark

06:50 - 23:21LHR London Heathrow-PWM Portland

21h 31m2 stops Brussels Bruxelles-National Newark

£551United Airlines

Mon, 16 Nov - Wed, 18 Nov

16:15 - 08:05PWM Portland-LHR London Heathrow

10h 50m1 stop New York John F Kennedy Intl

11:35 - 00:19LHR London Heathrow-PWM Portland

17h 44m1 stop New York John F Kennedy Intl

£551KLM

Wed, 4 Nov - Wed, 11 Nov

16:15 - 08:05PWM Portland-LHR London Heathrow

10h 50m1 stop New York John F Kennedy Intl

16:35 - 00:19LHR London Heathrow-PWM Portland

12h 44m1 stop New York John F Kennedy Intl

£551KLM

Wed, 4 Nov - Tue, 10 Nov

Cheap last-minute flights

Enter your travel dates to find the best prices.

14:38 - 06:55PWM Portland-LHR London Heathrow

11h 17m1 stop Washington, D.C. Dulles Intl

06:50 - 19:24LHR London Heathrow-PWM Portland

17h 34m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£739United Airlines

Tue, 15 Sep - Thu, 17 Sep

06:00 - 20:45PWM Portland-LHR London Heathrow

9h 45m1 stop New York John F Kennedy Intl

08:15 - 23:54LHR London Heathrow-PWM Portland

20h 39m1 stop New York John F Kennedy Intl

£742JetBlue

Tue, 15 Sep - Thu, 17 Sep

15:43 - 10:40PWM Portland-LHR London Heathrow

13h 57m2 stops Newark Washington, D.C. Dulles Intl

06:50 - 18:29LHR London Heathrow-PWM Portland

16h 39m2 stops Brussels Bruxelles-National Newark

£743United Airlines

Tue, 15 Sep - Thu, 17 Sep

06:00 - 09:30PWM Portland-LHR London Heathrow

22h 30m1 stop New York John F Kennedy Intl

08:15 - 23:54LHR London Heathrow-PWM Portland

20h 39m1 stop New York John F Kennedy Intl

£771JetBlue

Thu, 17 Sep - Sat, 19 Sep

14:38 - 06:55PWM Portland-LHR London Heathrow

11h 17m1 stop Washington, D.C. Dulles Intl

06:50 - 23:59LHR London Heathrow-PWM Portland

22h 09m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl

£813United Airlines

Thu, 17 Sep - Sat, 19 Sep

06:06 - 06:55PWM Portland-LHR London Heathrow

19h 49m2 stops Newark Washington, D.C. Dulles Intl

06:50 - 23:32LHR London Heathrow-PWM Portland

21h 42m2 stops Brussels Bruxelles-National Newark

£817United Airlines

Thu, 17 Sep - Sat, 19 Sep

06:00 - 09:00PWM Portland-LGW London Gatwick

22h 00m2 stops New York John F Kennedy Intl Frankfurt am Main

19:35 - 23:54LGW London Gatwick-PWM Portland

33h 19m2 stops Frankfurt am Main New York John F Kennedy Intl

£910Multiple Airlines

Tue, 15 Sep - Thu, 17 Sep

09:10 - 06:30PWM Portland-LHR London Heathrow

16h 20m3 stops Newark Toronto Pearson Intl Ottawa

14:10 - 23:59LHR London Heathrow-PWM Portland

14h 49m2 stops Ottawa Washington, D.C. Dulles Intl

£937Multiple Airlines

Thu, 17 Sep - Sat, 19 Sep

09:10 - 06:30PWM Portland-LHR London Heathrow

16h 20m3 stops Newark Toronto Pearson Intl Ottawa

08:30 - 23:32LHR London Heathrow-PWM Portland

20h 02m3 stops Toronto Pearson Intl Montreal Pierre Elliott Trudeau Intl Newark

£946Air Canada

Thu, 17 Sep - Sat, 19 Sep

06:00 - 20:25PWM Portland-LGW London Gatwick

33h 25m3 stops New York John F Kennedy Intl Lisbon Humberto Delgado Porto

21:20 - 23:54LGW London Gatwick-PWM Portland

31h 34m3 stops Porto Lisbon Humberto Delgado New York John F Kennedy Intl

£988Multiple Airlines

Tue, 15 Sep - Thu, 17 Sep

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Delta flights from Portland, Maine to United Kingdom

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

Delta

10 Nov

PWM06:00Portland

19h 25m

1 stop

LHR06:25London Heathrow

24 Nov

LHR08:55London Heathrow

20h 24m

2 stops

PWM00:19Portland

£546

Delta

7 Oct

PWM16:47Portland

14h 18m

2 stops

LHR12:05London Heathrow

14 Oct

LHR06:30London Heathrow

22h 40m

2 stops

PWM00:10Portland

£549

Delta

7 Oct

PWM16:47Portland

14h 18m

2 stops

LHR12:05London Heathrow

14 Oct

LHR08:55London Heathrow

20h 15m

2 stops

PWM00:10Portland

£550

KLM flights from Portland, Maine to United Kingdom

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

KLM

5 Nov

PWM14:09Portland

16h 31m

1 stop

LHR11:40London Heathrow

10 Nov

LHR11:45London Heathrow

17h 34m

2 stops

PWM00:19Portland

£584

KLM

3 Oct

PWM14:04Portland

16h 46m

1 stop

EDI11:50Edinburgh Turnhouse

11 Oct

EDI11:10Edinburgh Turnhouse

18h 00m

2 stops

PWM00:10Portland

£631

KLM

15 Jan

PWM06:00Portland

20h 50m

1 stop

LHR07:50London Heathrow

13 Mar

LHR12:40London Heathrow

14h 43m

1 stop

PWM22:23Portland

£632

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 Portland - LHR London Heathrow

PWMLHR

Portland

Wed 7/10

06:04-06:20

1 stop19h 16m

London Heathrow

Wed 14/10

11:30-00:10

2 stops17h 40m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 24/11

16:03-08:35

1 stop11h 32m

London Heathrow

Thu 3/12

08:55-00:21

2 stops20h 26m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-09:00

1 stop13h 55m

London Heathrow

Tue 24/11

08:55-00:19

2 stops20h 24m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

12:45-06:50

1 stop13h 05m

London Heathrow

Tue 17/11

06:30-00:19

2 stops22h 49m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

06:00-06:25

1 stop19h 25m

London Heathrow

Tue 24/11

08:55-00:19

2 stops20h 24m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

06:00-06:20

1 stop19h 20m

London Heathrow

Tue 17/11

08:55-00:19

2 stops20h 24m

£546

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 4/11

16:15-10:30

1 stop13h 15m

London Heathrow

Thu 12/11

11:45-00:19

2 stops17h 34m

£547

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

08:49-09:10

1 stop19h 21m

London Heathrow

Wed 18/11

06:50-23:21

2 stops21h 31m

£551

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 4/11

16:15-08:05

1 stop10h 50m

London Heathrow

Wed 11/11

11:35-00:19

1 stop17h 44m

£551

Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 4/11

16:15-08:05

1 stop10h 50m

London Heathrow

Tue 10/11

16:35-00:19

1 stop12h 44m

£551

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

What is the cheapest month to fly to United Kingdom?

The cheapest month to fly to United Kingdom from Portland, Maine is in January. Flight prices, which tend to average around £0, are often lower during this time because this is during the off-season. If you are unable to visit United Kingdom during the month of January, then departing from Portland, Maine during the month December is also very affordable. Most momondo users find prices during this month for around £517.

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

You could potentially save up to 36% 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

Best price found	£237
Fastest flight time	12h 00m
Direct flights	None

The best one-way flight to United Kingdom from Portland, Maine in the past 72 hours is £237. The best return flight deal from Portland, Maine to United Kingdom found on momondo in the last 72 hours is £546.

The fastest flight from Portland, Maine to United Kingdom takes 12h 00m

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 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.