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 41% of people opting to fly with this airline when travelling to United Kingdom. Keep in mind that there are 9 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, Delta, and KLM 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 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.

£293 Cheap Flights from Portland to the United Kingdom in 2025/26

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

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14:34 - 06:55PWM-LHR

11h 21m1 stop

09:00 - 23:59LHR-PWM

19h 59m2 stops

£441Delta

Find Deal

Tue, 2 Dec - Tue, 9 Dec

16:53 - 08:45PWM-LHR

10h 52m1 stop

16:10 - 23:59LHR-PWM

12h 49m1 stop

£447KLM

Find Deal

Tue, 2 Dec - Tue, 9 Dec

06:35 - 21:40PWM-LHR

34h 05m2 stops

06:40 - 23:54LHR-PWM

22h 14m2 stops

£454Scandinavian Airlines

Find Deal

Mon, 17 Nov - Mon, 24 Nov

06:35 - 16:00PWM-LHR

28h 25m2 stops

18:40 - 23:54LHR-PWM

34h 14m2 stops

£458Scandinavian Airlines

Find Deal

Mon, 17 Nov - Fri, 21 Nov

12:52 - 06:30PWM-LHR

12h 38m2 stops

07:50 - 18:15LHR-PWM

15h 25m2 stops

£464American Airlines

Find Deal

Tue, 2 Dec - Tue, 9 Dec

15:00 - 12:50PWM-LCY

16h 50m2 stops

17:45 - 18:54LCY-PWM

30h 09m2 stops

£488Multiple Airlines

Find Deal

Tue, 2 Dec - Tue, 9 Dec

12:23 - 07:00PWM-LHR

13h 37m2 stops

07:50 - 18:15LHR-PWM

15h 25m2 stops

£501American Airlines

Find Deal

Thu, 11 Dec - Tue, 16 Dec

19:22 - 16:40PWM-LCY

16h 18m2 stops

09:50 - 23:59LCY-PWM

19h 09m2 stops

£503Multiple Airlines

Find Deal

Wed, 5 Nov - Wed, 12 Nov

15:00 - 10:30PWM-EDI

14h 30m2 stops

09:25 - 21:17EDI-PWM

16h 52m2 stops

£532United Airlines

Find Deal

Tue, 2 Dec - Tue, 9 Dec

15:20 - 10:20PWM-MAN

14h 00m2 stops

06:10 - 21:17MAN-PWM

20h 07m2 stops

£540United Airlines

Find Deal

Wed, 3 Dec - Wed, 10 Dec

Delta flights from Portland, Maine to United Kingdom

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

Delta

2 Dec

PWM14:34Portland

11h 21m

1 stop

LHR06:55London Heathrow

9 Dec

LHR09:00London Heathrow

19h 59m

2 stops

PWM23:59Portland

£441

Find similar

Delta

17 Nov

PWM13:25Portland

14h 35m

1 stop

LHR09:00London Heathrow

24 Nov

LHR11:30London Heathrow

17h 24m

2 stops

PWM23:54Portland

£479

Find similar

Delta

4 Dec

PWM16:53Portland

15h 52m

2 stops

LHR13:45London Heathrow

11 Dec

LHR09:00London Heathrow

19h 59m

2 stops

PWM23:59Portland

£494

Find similar

KLM flights from Portland, Maine to United Kingdom

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

KLM

2 Dec

PWM16:53Portland

10h 52m

1 stop

LHR08:45London Heathrow

9 Dec

LHR16:10London Heathrow

12h 49m

1 stop

PWM23:59Portland

£447

Find similar

KLM

17 Nov

PWM14:30Portland

12h 35m

1 stop

LHR08:05London Heathrow

24 Nov

LHR16:10London Heathrow

12h 44m

1 stop

PWM23:54Portland

£485

Find similar

KLM

3 Dec

PWM14:34Portland

17h 11m

2 stops

GLA12:45Glasgow Intl

10 Dec

GLA13:25Glasgow Intl

15h 34m

2 stops

PWM23:59Portland

£499

Find similar

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

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 2/12

14:34-06:55

1 stop11h 21m

London Heathrow

Tue 9/12

09:00-23:59

2 stops19h 59m

£441

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 2/12

16:53-08:45

1 stop10h 52m

London Heathrow

Tue 9/12

16:10-23:59

1 stop12h 49m

£447

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 17/11

06:35-21:40

2 stops34h 05m

London Heathrow

Mon 24/11

06:40-23:54

2 stops22h 14m

£454

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 17/11

06:35-16:00

2 stops28h 25m

London Heathrow

Fri 21/11

18:40-23:54

2 stops34h 14m

£458

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 2/12

12:52-06:30

2 stops12h 38m

London Heathrow

Tue 9/12

07:50-18:15

2 stops15h 25m

£464

PortlandLondon

PWM - LCY

PWMLCY

Portland

Tue 2/12

15:00-12:50

2 stops16h 50m

London City

Tue 9/12

17:45-18:54

2 stops30h 09m

£488

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 11/12

12:23-07:00

2 stops13h 37m

London Heathrow

Tue 16/12

07:50-18:15

2 stops15h 25m

£501

PortlandLondon

PWM - LCY

PWMLCY

Portland

Wed 5/11

19:22-16:40

2 stops16h 18m

London City

Wed 12/11

09:50-23:59

2 stops19h 09m

£503

PortlandEdinburgh

PWM - EDI

PWMEDI

Portland

Tue 2/12

15:00-10:30

2 stops14h 30m

Edinburgh Turnhouse

Tue 9/12

09:25-21:17

2 stops16h 52m

£532

PortlandManchester

PWM - MAN

PWMMAN

Portland

Wed 3/12

15:20-10:20

2 stops14h 00m

Manchester

Wed 10/12

06:10-21:17

2 stops20h 07m

£540

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 October. Flight prices, which tend to average around £475, 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 October, then departing from Portland, Maine during the month February is also very affordable. Most momondo users find prices during this month for around £531.

What is the cheapest time of day to depart on your flight to United Kingdom?

The cheapest time of day to fly to United Kingdom is at midday when flights can be purchased for as low as £526. Try not to purchase tickets in the morning because they tend to be around £557. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

Direct flights	None

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 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.