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Cheap flights from Portland, Maine to London Heathrow Airport from £489

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to London Heathrow Airport departing on 1/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Portland, Maine to London

Cheap return flights

These are some of the best return flight deals from Portland, Maine to London that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Portland, Maine to London.

Cheap last-minute flights

Planning a quick getaway from Portland, Maine to London? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to London, so you can enjoy a seamless trip without stopovers.

Cheap bus & train deals from Portland, Maine to London

Find recent round-trip train or bus tickets from Portland, Maine to London.

All round-trip flight deals to London

The cheapest plane tickets to London found on KAYAK recently.
17:50 - 09:30PWM-LHR
10h 40m1 stop
08:25 - 16:55LHR-PWM
13h 30m1 stop
£489JetBlue
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Thu, 1 May - Mon, 5 May
17:30 - 09:30PWM-LHR
11h 00m1 stop
07:25 - 16:35LHR-PWM
14h 10m1 stop
£500JetBlue
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Mon, 21 Apr - Tue, 29 Apr
14:35 - 09:20PWM-LHR
14h 45m2 stops
17:00 - 23:31LHR-PWM
35h 31m2 stops
£566Scandinavian Airlines
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Thu, 27 Mar - Tue, 8 Apr
14:35 - 14:35PWM-LHR
20h 00m3 stops
07:05 - 23:31LHR-PWM
21h 26m2 stops
£603Scandinavian Airlines
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Thu, 27 Mar - Tue, 8 Apr
09:34 - 06:55PWM-LHR
16h 21m1 stop
13:45 - 23:17LHR-PWM
14h 32m2 stops
£625United Airlines
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Sun, 20 Apr - Tue, 29 Apr
06:01 - 07:10PWM-LHR
20h 09m2 stops
15:00 - 23:15LHR-PWM
37h 15m2 stops
£659Air Canada
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Fri, 21 Feb - Fri, 28 Feb
12:15 - 05:55PWM-LHR
12h 40m1 stop
12:05 - 23:15LHR-PWM
16h 10m2 stops
£663United Airlines
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Fri, 21 Feb - Fri, 28 Feb
06:00 - 07:10PWM-LHR
20h 10m2 stops
19:25 - 22:30LHR-PWM
32h 05m2 stops
Thu, 9 Jan - Mon, 20 Jan
06:00 - 07:10PWM-LHR
20h 10m2 stops
19:25 - 22:30LHR-PWM
32h 05m2 stops
Thu, 9 Jan - Mon, 20 Jan
06:00 - 07:10PWM-LHR
20h 10m2 stops
15:00 - 22:50LHR-PWM
36h 50m2 stops
£711Air Canada
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Wed, 4 Dec - Wed, 11 Dec
PWM-LHR
3173 mimulti-stop
Multiple Airlines
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14:55 - 16:00PWM-LHR
20h 05m2 stops
19:30 - 23:59LHR-PWM
33h 29m2 stops
£576Scandinavian Airlines
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Tue, 26 Nov - Tue, 3 Dec
14:55 - 12:55PWM-LHR
17h 00m3 stops
06:40 - 23:59LHR-PWM
22h 19m2 stops
£842Scandinavian Airlines
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Tue, 26 Nov - Tue, 3 Dec
11:24 - 19:30PWM-LHR
27h 06m3 stops
12:15 - 12:11LHR-PWM
28h 56m3 stops
£1,125
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Tue, 26 Nov - Tue, 3 Dec
13:31 - 06:40PWM-LHR
12h 09m1 stop
15:00 - 14:59LHR-PWM
28h 59m2 stops
£1,330United Airlines
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Tue, 26 Nov - Tue, 3 Dec
14:55 - 07:55PWM-LHR
12h 00m1 stop
14:30 - 23:47LHR-PWM
14h 17m1 stop
£1,348KLM
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Tue, 26 Nov - Tue, 3 Dec
06:10 - 12:40PWM-LHR
25h 30m3 stops
12:15 - 17:34LHR-PWM
34h 19m3 stops
£1,537
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Tue, 26 Nov - Thu, 28 Nov
06:00 - 11:50PWM-LHR
24h 50m2 stops
09:00 - 22:50LHR-PWM
42h 50m2 stops
£1,544Air Canada
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Sat, 23 Nov - Sat, 30 Nov
09:40 - 10:50PWM-LHR
20h 10m1 stop
07:00 - 20:09LHR-PWM
18h 09m2 stops
£1,798United Airlines
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Tue, 26 Nov - Thu, 28 Nov
14:55 - 07:55PWM-LHR
12h 00m1 stop
12:30 - 21:52LHR-PWM
14h 22m1 stop
£1,893KLM
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Tue, 26 Nov - Thu, 28 Nov
11:25 - 11:50PWM-LHR
19h 25m3 stops
09:00 - 23:20LHR-PWM
19h 20m3 stops
£2,641Air Canada
Find Deal
Sat, 23 Nov - Sat, 30 Nov

Scandinavian Airlines flights from Portland, Maine to London Heathrow Airport

Our best Scandinavian Airlines deals on Portland, Maine to London Heathrow Airport flight tickets
Scandinavian Airlines
27 Mar
PWM14:35Portland
14h 45m
2 stops
LHR09:20London Heathrow
8 Apr
LHR17:00London Heathrow
35h 31m
2 stops
PWM23:31Portland
Scandinavian Airlines
26 Nov
PWM14:55Portland
20h 05m
2 stops
LHR16:00London Heathrow
3 Dec
LHR19:30London Heathrow
33h 29m
2 stops
PWM23:59Portland
Scandinavian Airlines
27 Mar
PWM14:35Portland
20h 00m
3 stops
LHR14:35London Heathrow
8 Apr
LHR07:05London Heathrow
21h 26m
2 stops
PWM23:31Portland

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
20 Apr
PWM09:34Portland
16h 21m
1 stop
LHR06:55London Heathrow
29 Apr
LHR13:45London Heathrow
14h 32m
2 stops
PWM23:17Portland
United Airlines
21 Feb
PWM12:15Portland
12h 40m
1 stop
LHR05:55London Heathrow
28 Feb
LHR12:05London Heathrow
16h 10m
2 stops
PWM23:15Portland
United Airlines
9 Jan
PWM18:05Portland
10h 05m
1 stop
LHR09:10London Heathrow
20 Jan
LHR13:30London Heathrow
32h 22m
2 stops
PWM16:52Portland

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 £561. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from Portland, Maine averaging around £576.

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

£489

Fastest flight time

9h 30m

Direct flights

None
The best flight deal from Portland, Maine to London Heathrow Airport found on momondo in the last 72 hours is £489
The fastest flight from Portland, Maine to London Heathrow Airport takes 9h 30m
There are no direct flights from Portland, Maine to London Heathrow Airport. Popular non-direct route for this connection is Portland Airport - 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 30m.

  • 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.


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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