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Cheap flights from Portland, Maine to London from £218

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.
United Airlines Logo
15:41 - 11:15PWM  Portland-LHR London Heathrow
14h 34m2 stops Newark Zurich
United Airlines Logo
09:00 - 23:21LHR  London Heathrow-PWM Portland
43h 21m2 stops Halifax Intl Newark
£575United Airlines
Mon, 16 Nov - Wed, 18 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
£576United Airlines
Mon, 16 Nov - Wed, 18 Nov
United Airlines Logo
15:41 - 16:20PWM  Portland-LHR London Heathrow
19h 39m2 stops Newark Zurich
United Airlines Logo
09:00 - 23:21LHR  London Heathrow-PWM Portland
43h 21m2 stops Halifax Intl Newark
£579United Airlines
Mon, 16 Nov - Wed, 18 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
£579United Airlines
Mon, 16 Nov - Wed, 18 Nov
United Airlines Logo
05:35 - 07:10PWM  Portland-LHR London Heathrow
20h 35m2 stops Newark Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
06:50 - 23:21LHR  London Heathrow-PWM Portland
21h 31m2 stops Brussels Bruxelles-National Newark
£582United Airlines
Mon, 16 Nov - Wed, 18 Nov
Multiple Airlines Logo
09:46 - 07:10PWM  Portland-LHR London Heathrow
16h 24m2 stops Washington, D.C. Dulles Intl Montreal Pierre Elliott Trudeau Intl
Multiple Airlines Logo
06:00 - 23:21LHR  London Heathrow-PWM Portland
22h 21m3 stops Zurich Toronto Pearson Intl Newark
£584Multiple Airlines
Tue, 10 Nov - Thu, 12 Nov
Air Canada Logo
08:49 - 06:30PWM  Portland-LHR London Heathrow
16h 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
£590Air Canada
Tue, 10 Nov - Thu, 12 Nov
United Airlines Logo
15:41 - 11:15PWM  Portland-LHR London Heathrow
14h 34m2 stops Newark Zurich
United Airlines Logo
09:10 - 19:02LHR  London Heathrow-PWM Portland
14h 52m2 stops Newark Washington, D.C. Dulles Intl
£596United Airlines
Tue, 10 Nov - Thu, 12 Nov
JetBlue Logo
06:30 - 21:40PWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
12:20 - 23:43LHR  London Heathrow-PWM Portland
16h 23m1 stop New York John F Kennedy Intl
£623JetBlue
Tue, 10 Nov - Thu, 12 Nov
JetBlue Logo
06:30 - 21:40PWM  Portland-LHR London Heathrow
10h 10m1 stop New York John F Kennedy Intl
JetBlue Logo
12:20 - 23:43LHR  London Heathrow-PWM Portland
16h 23m1 stop New York John F Kennedy Intl
£627JetBlue
Mon, 16 Nov - Wed, 18 Nov

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Delta flights from Portland, Maine to London Heathrow Airport

Our best Delta deals on Portland, Maine to London Heathrow Airport flight tickets
Delta
5 Nov
PWM12:42Portland
14h 03m
1 stop
LHR07:45London Heathrow
18 Nov
LHR08:40London Heathrow
19h 51m
2 stops
PWM23:31Portland
£657
Delta
29 Dec
PWM13:20Portland
12h 55m
1 stop
LHR07:15London Heathrow
12 Jan
LHR06:30London Heathrow
22h 25m
2 stops
PWM23:55Portland
£660
Delta
5 Nov
PWM16:15Portland
13h 15m
2 stops
LHR10:30London Heathrow
18 Nov
LHR08:40London Heathrow
19h 51m
2 stops
PWM23:31Portland
£661

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
PWM15:41Portland
14h 34m
2 stops
LHR11:15London Heathrow
18 Nov
LHR09:00London Heathrow
43h 21m
2 stops
PWM23:21Portland
£575
United Airlines
16 Nov
PWM08:49Portland
19h 21m
1 stop
LHR09:10London Heathrow
18 Nov
LHR06:50London Heathrow
21h 31m
2 stops
PWM23:21Portland
£576
United Airlines
16 Nov
PWM15:41Portland
19h 39m
2 stops
LHR16:20London Heathrow
18 Nov
LHR09:00London Heathrow
43h 21m
2 stops
PWM23:21Portland
£579

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

Mon 16/11

15:41-11:15

2 stops14h 34m

London Heathrow

Wed 18/11

09:00-23:21

2 stops43h 21m

£575

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

£576

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

15:41-16:20

2 stops19h 39m

London Heathrow

Wed 18/11

09:00-23:21

2 stops43h 21m

£579

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

£579

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

05:35-07:10

2 stops20h 35m

London Heathrow

Wed 18/11

06:50-23:21

2 stops21h 31m

£582

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

09:46-07:10

2 stops16h 24m

London Heathrow

Thu 12/11

06:00-23:21

3 stops22h 21m

£584

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

08:49-06:30

3 stops16h 41m

London Heathrow

Thu 12/11

06:00-23:21

3 stops22h 21m

£590

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

15:41-11:15

2 stops14h 34m

London Heathrow

Thu 12/11

09:10-19:02

2 stops14h 52m

£596
Fastest return journey

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Tue 10/11

06:30-21:40

1 stop10h 10m

London Heathrow

Thu 12/11

12:20-23:43

1 stop16h 23m

£623

PortlandLondon

PWM Portland - LHR London Heathrow

PWMLHR

Portland

Mon 16/11

06:30-21:40

1 stop10h 10m

London Heathrow

Wed 18/11

12:20-23:43

1 stop16h 23m

£627

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

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, January 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 March is another great option to travel to London Heathrow Airport, with average flight prices from Portland, Maine averaging around £491.

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

£218

Fastest flight time

10h 20m

Direct flights

None
The best one-way flight to London Heathrow Airport from Portland, Maine in the past 72 hours is £218. The best return flight deal from Portland, Maine to London Heathrow Airport found on momondo in the last 72 hours is £575.
The fastest flight from Portland, Maine to London Heathrow Airport takes 10h 20m
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 20m.

  • 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
Ipswich
Slough
Swindon
Maidstone
Folkestone
Hastings
Ilford
Canterbury
Poole
Salisbury
Colchester
Chichester

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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