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Cheap flights from Portland, Maine to London from £237

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Portland, Maine to London

Cheap return flights

Enter your travel dates to find the best prices.
Delta Logo
12:45 - 06:50PWM  Portland-LHR London Heathrow
13h 05m1 stop Detroit Metropolitan Wayne County
Delta Logo
06:30 - 00:19LHR  London Heathrow-PWM Portland
22h 49m2 stops Amsterdam Schiphol New York John F Kennedy Intl
£545Delta
Tue, 10 Nov - Tue, 17 Nov
Delta Logo
16:47 - 12:05PWM  Portland-LHR London Heathrow
14h 18m2 stops Detroit Metropolitan Wayne County New York John F Kennedy Intl
Delta Logo
06:30 - 00:10LHR  London Heathrow-PWM Portland
22h 40m2 stops Amsterdam Schiphol New York John F Kennedy Intl
£548Delta
Wed, 7 Oct - Wed, 14 Oct
Multiple Airlines Logo
14:05 - 09:00PWM  Portland-LHR London Heathrow
13h 55m1 stop Atlanta Hartsfield-Jackson
Multiple Airlines Logo
15:50 - 00:19LHR  London Heathrow-PWM Portland
13h 29m1 stop New York John F Kennedy Intl
£551Multiple Airlines
Tue, 10 Nov - Tue, 17 Nov
United Airlines Logo
08:49 - 09:10PWM  Portland-LHR London Heathrow
19h 21m1 stop Newark
United Airlines Logo
06:50 - 23:21LHR  London Heathrow-PWM Portland
21h 31m2 stops Brussels Bruxelles-National Newark
£560United Airlines
Mon, 16 Nov - Wed, 18 Nov
United Airlines Logo
14:05 - 09:10PWM  Portland-LHR London Heathrow
14h 05m2 stops Washington, D.C. Dulles Intl Newark
United Airlines Logo
06:50 - 19:02LHR  London Heathrow-PWM Portland
17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
£564United Airlines
Tue, 10 Nov - Thu, 12 Nov
United Airlines Logo
17:08 - 07:55PWM  Portland-LHR London Heathrow
33h 47m1 stop Chicago O'Hare Intl
United Airlines Logo
06:50 - 19:02LHR  London Heathrow-PWM Portland
17h 12m2 stops Brussels Bruxelles-National Washington, D.C. Dulles Intl
£565United Airlines
Mon, 9 Nov - Thu, 12 Nov
Delta Logo
11:50 - 07:40PWM  Portland-LHR London Heathrow
14h 50m2 stops Minneapolis St Paul Amsterdam Schiphol
Delta Logo
11:45 - 00:10LHR  London Heathrow-PWM Portland
17h 25m2 stops Amsterdam Schiphol New York John F Kennedy Intl
£568Delta
Mon, 5 Oct - Tue, 20 Oct
Air Canada Logo
08:49 - 08:30PWM  Portland-LHR London Heathrow
18h 41m3 stops Newark Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
Air Canada Logo
06:00 - 23:21LHR  London Heathrow-PWM Portland
22h 21m3 stops Zurich Toronto Pearson Intl Newark
£579Air Canada
Tue, 10 Nov - Thu, 12 Nov
United Airlines Logo
15:41 - 10:05PWM  Portland-LHR London Heathrow
13h 24m2 stops Newark Brussels Bruxelles-National
United Airlines Logo
09:10 - 21:51LHR  London Heathrow-PWM Portland
17h 41m2 stops Newark Chicago O'Hare Intl
£580United Airlines
Mon, 16 Nov - Wed, 18 Nov
Delta Logo
06:28 - 06:20PWM  Portland-LHR London Heathrow
18h 52m1 stop New York LaGuardia
Delta Logo
11:45 - 23:18LHR  London Heathrow-PWM Portland
40h 33m2 stops Amsterdam Schiphol New York John F Kennedy Intl
£582Delta
Thu, 8 Oct - Mon, 12 Oct

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Air Canada flights from Portland, Maine to London Heathrow Airport

Our best Air Canada deals on Portland, Maine to London Heathrow Airport flight tickets
Air Canada
10 Nov
PWM08:49Portland
18h 41m
3 stops
LHR08:30London Heathrow
12 Nov
LHR06:00London Heathrow
22h 21m
3 stops
PWM23:21Portland
£579
Air Canada
10 Oct
PWM06:00Portland
34h 00m
2 stops
LHR21:00London Heathrow
28 Oct
LHR09:00London Heathrow
42h 21m
2 stops
PWM23:21Portland
£644
Air Canada
14 Oct
PWM06:00Portland
21h 35m
2 stops
LHR08:35London Heathrow
23 Oct
LHR09:30London Heathrow
33h 21m
2 stops
PWM13:51Portland
£646

United Airlines flights from Portland, Maine to London Heathrow Airport

Our best United Airlines deals on Portland, Maine to London Heathrow Airport flight tickets
United Airlines
16 Nov
PWM08:49Portland
19h 21m
1 stop
LHR09:10London Heathrow
18 Nov
LHR06:50London Heathrow
21h 31m
2 stops
PWM23:21Portland
£560
United Airlines
10 Nov
PWM14:05Portland
14h 05m
2 stops
LHR09:10London Heathrow
12 Nov
LHR06:50London Heathrow
17h 12m
2 stops
PWM19:02Portland
£564
United Airlines
9 Nov
PWM17:08Portland
33h 47m
1 stop
LHR07:55London Heathrow
12 Nov
LHR06:50London Heathrow
17h 12m
2 stops
PWM19:02Portland
£565

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 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

£545

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Wed 7/10

16:47-12:05

2 stops14h 18m

London Heathrow

Wed 14/10

06:30-00:10

2 stops22h 40m

£548
Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-09:00

1 stop13h 55m

London Heathrow

Tue 17/11

15:50-00:19

1 stop13h 29m

£551

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

£560

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

14:05-09:10

2 stops14h 05m

London Heathrow

Thu 12/11

06:50-19:02

2 stops17h 12m

£564

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 9/11

17:08-07:55

1 stop33h 47m

London Heathrow

Thu 12/11

06:50-19:02

2 stops17h 12m

£565

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 5/10

11:50-07:40

2 stops14h 50m

London Heathrow

Tue 20/10

11:45-00:10

2 stops17h 25m

£568

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

08:49-08:30

3 stops18h 41m

London Heathrow

Thu 12/11

06:00-23:21

3 stops22h 21m

£579

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

15:41-10:05

2 stops13h 24m

London Heathrow

Wed 18/11

09:10-21:51

2 stops17h 41m

£580

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Thu 8/10

06:28-06:20

1 stop18h 52m

London Heathrow

Mon 12/10

11:45-23:18

2 stops40h 33m

£582

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

What is the cheapest month to fly to London Heathrow Airport?

In general, December is the cheapest month to fly from Portland, Maine to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £0. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Portland, Maine averaging around £0.

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

Best price found

£237

Fastest flight time

10h 05m

Direct flights

None
The best one-way flight to London Heathrow Airport from Portland, Maine in the past 72 hours is £237. The best return flight deal from Portland, Maine to London Heathrow Airport found on momondo in the last 72 hours is £545.
The fastest flight from Portland, Maine to London Heathrow Airport takes 10h 05m
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.
Search flight deals

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 10h 05m.

  • 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Wembley
Gatwick
Milton Keynes
Stratford-upon-Avon
Southend-on-Sea
Luton
Northampton
Slough
Ipswich
Swindon
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Poole
Chichester
Hayes
Bedford

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.

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