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Cheap flights from London to Portland, Maine from £466

LON — PWM
9 Dec — 16 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Portland

Enter your travel dates to find the best prices.

Cheapest flights from London to Portland

Sat 12/1213:05 -
2 stops39h 47m
Sun 20/1205:35 -
2 stops46h 00m
Deal found 4/11£880
Mon 21/1210:25 -
1 stop17h 20m
Mon 28/1205:15 -
1 stop20h 25m
Deal found 6/11£937
Sat 12/1216:35 -
1 stop12h 46m
Sun 20/1212:59 -
1 stop13h 46m
Deal found 4/11£943
Thu 24/1207:00 -
2 stops17h 03m
Thu 31/1215:38 -
2 stops14h 12m
Deal found 8/11£949
Tue 22/1220:10 -
1 stop21h 26m
Tue 29/1213:20 -
1 stop12h 00m
Deal found 7/11£949
Tue 22/1213:10 -
2 stops16h 13m
Tue 29/1218:42 -
1 stop32h 08m
Deal found 7/11£955
Mon 21/1213:10 -
2 stops16h 13m
Mon 28/1215:21 -
2 stops12h 59m
Deal found 6/11£971
Tue 22/1213:30 -
2 stops15h 53m
Tue 29/1218:42 -
2 stops14h 53m
Deal found 7/11£993
Mon 9/1112:10 -
2 stops16h 33m
Wed 11/1106:30 -
2 stops33h 55m
Deal found 6/11£1,003
Sun 20/1212:50 -
1 stop25h 17m
Sun 27/1219:08 -
1 stop30h 32m
Deal found 5/11£1,015
Sun 20/1213:10 -
2 stops14h 49m
Sun 27/1212:42 -
1 stop14h 08m
Deal found 5/11£1,056

Find flight deals from London to Portland

Round-trip from

£880

One-way from

£466

Popular in

July

Cheapest in

February

Average price

£894
Virgin Atlantic
  • Virgin Atlantic
  • 12/12-20/12
  • 4 total stops
  • 85h 47m total
  • London to Portland
Search Deals
15/1-31/12
  • 15/1-31/12
  • 3 total stops
  • 31h 28m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£87 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£24 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2026
Search Deals

Cheapflights Fare Finder

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

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Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 4/1

20:15-09:08

2 stops41h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£507

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 15/1

12:15-08:50

1 stop25h 35m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£579

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 4/1

11:30-23:55

2 stops17h 25m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£602

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 4/1

20:10-14:23

1 stop23h 13m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£624

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 3/1

19:20-23:31

2 stops33h 11m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£627

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 21/12

18:00-10:46

2 stops21h 46m

Portland

Mon 28/12

05:15-06:40

1 stop20h 25m

£937

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 24/12

07:00-19:03

2 stops17h 03m

Portland

Thu 31/12

15:38-10:50

2 stops14h 12m

£949

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 22/12

20:10-12:36

1 stop21h 26m

Portland

Tue 29/12

13:20-06:20

1 stop12h 00m

£949

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 22/12

13:10-00:23

2 stops16h 13m

Portland

Tue 29/12

18:42-07:50

1 stop32h 08m

£955

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 22/12

13:30-00:23

2 stops15h 53m

Portland

Tue 29/12

18:42-14:35

2 stops14h 53m

£993

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 15 resultsSorted by cheapest first
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Best time to book a flight from London to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from London with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from London to Portland

What is the cheapest month to book a flight from London to Portland, Maine?

Currently, January is the cheapest month in which you can book a flight from London to Portland, Maine (average of £602). Flying from London to Portland, Maine in July is currently the most expensive (average of £1,001). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What’s the top stopover airport for flights from London to Portland, Maine?

Newark (EWR) – chosen by Cheapflights users on 45% of one-stop itineraries from London to Portland, Maine on Cheapflights.

What’s the cheapest stopover airport for flights from London to Portland, Maine?

Philadelphia (PHL) is the most affordable one-stop option, with an average return flight price of £703.

What’s the fastest stopover option from London to Portland, Maine?

Flights via Philadelphia (PHL) have the shortest average one-way travel time for one-stop routes: 11h 28m.

Which airport typically offers the quickest stopover for flights from London to Portland, Maine?

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 38m.

Related info for your journey

  • What airport do you fly into for flights to Portland from London?

    If you book a flight to Portland from London, you will be flying to Portland, which is the city’s only airport. Portland (PWM) is located 2.9 mi from the center of Portland. There are 0 flights from London to Portland per day from 0 different airlines.

  • How long is the flight from London to Portland, Maine?

    United Airlines, Delta, and British Airways can get you from London to Portland, Maine in just under 16h 13m. Your travel time can differ by up to 5h 33m. The distance between London and Portland, Maine is about 3173 mi. Both multi-stop and direct flights can be found to your destination and back.

  • Can I find deals for flights from London to Portland that include hotel bookings?

    Yes. In addition to deals on London to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Portland.

  • Can I find deals for business class flights from London to Portland?

    Yes. Cheapflights offers flight deals from London to Portland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London to Portland, Maine?

    Currently, January is the cheapest month in which you can book a flight from London to Portland, Maine (average of £602). Flying from London to Portland, Maine in July is currently the most expensive (average of £1,001). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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How does Cheapflights help users find flights from London to Portland?

When you search for this flight from London to Portland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from London to Portland?

Cheapflights helps you find that perfect flight to Portland from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from London to Portland with no change fees?

Need flexible booking options for your flight to Portland from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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