When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?

Prices for flights from Portland Airport to London Heathrow Airport refresh daily.

How old do you have to be to fly from Portland Airport to London Heathrow Airport?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£581 Cheap Flights from Portland, Maine to London Heathrow Airport in 2026

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Find the cheapest flights from Portland, Maine to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:05 - 06:25

PWM

LHR

19h 20m

1 stop

08:40 - 23:13

LHR

PWM

19h 33m

2 stops

£581Virgin Atlantic

Thu, 27 Aug - Mon, 31 Aug

06:30 - 09:35

PWM

LHR

22h 05m

2 stops

19:50 - 23:59

LHR

PWM

33h 09m

2 stops

£585Scandinavian Airlines

Thu, 10 Sep - Thu, 17 Sep

14:35 - 16:00

PWM

LHR

20h 25m

2 stops

17:30 - 23:49

LHR

PWM

35h 19m

2 stops

£597Scandinavian Airlines

Thu, 15 Oct - Tue, 20 Oct

14:35 - 16:00

PWM

LHR

20h 25m

2 stops

15:35 - 23:49

LHR

PWM

37h 14m

2 stops

£598Scandinavian Airlines

Thu, 1 Oct - Wed, 7 Oct

14:35 - 16:00

PWM

LHR

20h 25m

2 stops

06:40 - 23:59

LHR

PWM

22h 19m

2 stops

£609Scandinavian Airlines

Thu, 17 Sep - Thu, 24 Sep

09:10 - 07:10

PWM

LHR

17h 00m

2 stops

12:20 - 23:43

LHR

PWM

16h 23m

1 stop

£615Multiple Airlines

Tue, 3 Nov - Wed, 11 Nov

16:48 - 07:55

PWM

LHR

34h 07m

1 stop

06:35 - 19:24

LHR

PWM

17h 49m

2 stops

£636United Airlines

Mon, 30 Nov - Thu, 3 Dec

14:35 - 18:30

PWM

LHR

22h 55m

2 stops

06:40 - 23:49

LHR

PWM

22h 09m

2 stops

£637Scandinavian Airlines

Tue, 10 Nov - Tue, 24 Nov

16:48 - 07:55

PWM

LHR

34h 07m

1 stop

06:35 - 14:34

LHR

PWM

36h 59m

2 stops

£641United Airlines

Mon, 30 Nov - Thu, 3 Dec

16:48 - 07:55

PWM

LHR

34h 07m

1 stop

07:30 - 18:13

LHR

PWM

15h 43m

2 stops

£645United Airlines

Mon, 30 Nov - Thu, 3 Dec

JetBlue flights from Portland, Maine to London Heathrow Airport

Our best JetBlue deals on Portland, Maine to London Heathrow Airport flight tickets

JetBlue

10 Nov

PWM06:30Portland

22h 00m

1 stop

LHR09:30London Heathrow

17 Nov

LHR07:25London Heathrow

21h 18m

1 stop

PWM23:43Portland

£669

JetBlue

10 Nov

PWM06:30Portland

22h 00m

1 stop

LHR09:30London Heathrow

17 Nov

LHR12:20London Heathrow

16h 23m

1 stop

PWM23:43Portland

£671

JetBlue

18 Aug

PWM13:17Portland

15h 13m

1 stop

LHR09:30London Heathrow

27 Aug

LHR11:55London Heathrow

17h 19m

1 stop

PWM00:14Portland

£682

KLM flights from Portland, Maine to London Heathrow Airport

Our best KLM deals on Portland, Maine to London Heathrow Airport flight tickets

KLM

10 Nov

PWM13:35Portland

13h 15m

1 stop

LHR07:50London Heathrow

24 Nov

LHR10:45London Heathrow

16h 38m

1 stop

PWM22:23Portland

£672

KLM

18 Sept

PWM14:35Portland

13h 15m

1 stop

LHR08:50London Heathrow

23 Sept

LHR16:20London Heathrow

12h 39m

1 stop

PWM23:59Portland

£687

KLM

10 Sept

PWM14:35Portland

14h 45m

1 stop

LHR10:20London Heathrow

17 Sept

LHR11:45London Heathrow

17h 14m

1 stop

PWM23:59Portland

£687

momondo Fare Finder

Use the filters below to find and compare flights from Portland, Maine to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 27/8

06:05-06:25

1 stop19h 20m

London Heathrow

Mon 31/8

08:40-23:13

2 stops19h 33m

£581

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 10/9

06:30-09:35

2 stops22h 05m

London Heathrow

Thu 17/9

19:50-23:59

2 stops33h 09m

£585

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 15/10

14:35-16:00

2 stops20h 25m

London Heathrow

Tue 20/10

17:30-23:49

2 stops35h 19m

£597

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 1/10

14:35-16:00

2 stops20h 25m

London Heathrow

Wed 7/10

15:35-23:49

2 stops37h 14m

£598

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 17/9

14:35-16:00

2 stops20h 25m

London Heathrow

Thu 24/9

06:40-23:59

2 stops22h 19m

£609

Fastest return journey

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 3/11

09:10-07:10

2 stops17h 00m

London Heathrow

Wed 11/11

12:20-23:43

1 stop16h 23m

£615

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 30/11

16:48-07:55

1 stop34h 07m

London Heathrow

Thu 3/12

06:35-19:24

2 stops17h 49m

£636

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 10/11

14:35-18:30

2 stops22h 55m

London Heathrow

Tue 24/11

06:40-23:49

2 stops22h 09m

£637

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 30/11

16:48-07:55

1 stop34h 07m

London Heathrow

Thu 3/12

06:35-14:34

2 stops36h 59m

£641

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 30/11

16:48-07:55

1 stop34h 07m

London Heathrow

Thu 3/12

07:30-18:13

2 stops15h 43m

£645

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Portland, Maine to London Heathrow Airport

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

Which airlines fly to London Heathrow Airport?

British Airways, Virgin Atlantic and Iberia are the top three most popular airlines that fly to London Heathrow Airport from Portland, Maine according to our data. British Airways is the first choice among our users, with 44% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 9 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

When to book flights from Portland, Maine to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Portland, Maine to London Heathrow Airport (PWM to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Portland, Maine to London Heathrow Airport

Fastest flight time	9h 40m
Direct flights	None

The fastest flight from Portland, Maine to London Heathrow Airport takes 9h 40m

There are no direct flights from Portland, Maine to London Heathrow Airport. There are no popular flight routes from Portland, Maine to London Heathrow Airport.

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Frequently asked questions about flying from Portland, Maine to London Heathrow Airport

How far is Portland to London Heathrow by plane?
London Heathrow is 3170.3 mi away from Portland. In terms of flight time, this usually takes a little over 9h 40m.
When did momondo last update prices for flights from Portland Airport to London Heathrow Airport?
Prices for flights from Portland Airport to London Heathrow Airport refresh daily.
How old do you have to be to fly from Portland Airport to London Heathrow Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Eastbourne

Milton Keynes

Gatwick

Luton

Wembley

Stratford-upon-Avon

Slough

Maidstone

Southend-on-Sea

Northampton

Swindon

Ipswich

Ilford

Canterbury

Guildford

Poole

Hayes

Folkestone

Chelmsford

Dover

Why use momondo?

Why should I use momondo to find a flight deal from Portland to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Portland.

Can I find flights from Portland to London with flexible booking policies on momondo?

Yes. All flights to London 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 London?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to London.

I’m not ready to book a flight from Portland to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Portland to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.