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Cheap flights from London Heathrow Airport to Portland, Maine from £436

LHR — PWM
30 Oct — 6 Nov1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Portland

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Portland

Wed 11/1112:20 -
1 stop16h 23m
Wed 18/1106:30 -
1 stop10h 10m
Deal found 27/9£570
Thu 12/1112:20 -
1 stop16h 23m
Thu 19/1106:30 -
1 stop10h 10m
Deal found 28/9£571
Tue 10/1107:25 -
1 stop21h 18m
Tue 17/1106:30 -
1 stop10h 10m
Deal found 26/9£590
Thu 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops31h 30m
Deal found 29/9£598
Tue 20/1011:55 -
1 stop16h 59m
Wed 28/1006:30 -
1 stop11h 10m
Deal found 27/9£605
Sat 31/1012:20 -
1 stop15h 23m
Wed 4/1112:42 -
1 stop14h 03m
Deal found 28/9£636
Wed 11/1112:20 -
1 stop16h 23m
Wed 18/1108:49 -
2 stops17h 21m
Deal found 27/9£641
Wed 21/1011:55 -
1 stop16h 59m
Sat 31/1014:33 -
2 stops36h 32m
Deal found 28/9£670
Fri 16/1011:55 -
1 stop16h 59m
Wed 21/1006:00 -
1 stop22h 30m
Deal found 27/9£684

Find flight deals from Heathrow to Portland

Round-trip from

£570

One-way from

£436

Popular in

September

Cheapest in

April

Average price

£1,590
JetBlue
  • JetBlue
  • 11/11-18/11
  • 2 total stops
  • 26h 33m total
  • London to Portland
Search Deals
13/2-31/12
  • 13/2-31/12
  • 2 total stops
  • 41h 33m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£194 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 11% potential price decrease (£61 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

15:40-11:56

1 stop25h 16m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£543

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

17:50-15:16

2 stops26h 26m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£545
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 13/2

13:10-22:59

1 stop14h 49m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£556

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

06:40-00:21

2 stops22h 41m

Portland

Sun 6/12

06:00-18:30

2 stops31h 30m

£598

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 19/10

19:50-23:54

2 stops33h 04m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£642

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 27/10

07:30-18:52

2 stops15h 22m

Portland

Tue 3/11

15:41-10:50

2 stops14h 09m

£745

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

07:30-19:25

2 stops16h 55m

Portland

Sun 6/12

19:55-21:20

1 stop20h 25m

£759

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 1/3

10:50-22:23

1 stop16h 33m

Portland

Sun 7/3

18:50-06:25

1 stop30h 35m

£761

Flights are sorted by cheapest return flights first.

Deals found on 28/9

Sorted by cheapest first

Best time to book a flight from Heathrow to Portland

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

Cheapflights Insights

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

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

Atlanta (ATL) – chosen by Cheapflights users on 67% of one-stop itineraries from London Heathrow Airport to Portland, Maine on Cheapflights.

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

Newark (EWR) is the most affordable one-stop option, with an average return flight price of £551.

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

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 10h 53m.

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

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 17m.

Related info for your journey

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

    Located just 2.9 mi from the city center, Portland is the airport most travelers will use when flying to Portland from London Heathrow. Booking flights from London Heathrow to Portland (PWM) should be relatively easy as there are 0 daily inbound flights from London Heathrow from 0 different airlines.

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

    Scandinavian Airlines and United Airlines can get you from London Heathrow Airport to Portland, Maine in just under 15h 22m. Your travel time can differ by up to 7h 19m. The distance from London Heathrow Airport to Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Heathrow 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Heathrow to Portland

Heathrow to Boston flights
Gatwick to Boston flights
London City to Boston flights
Stansted to Boston flights
Luton to Boston flights
Heathrow to Bangor flights
Southend to Boston flights

Fly with Cheapflights

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

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Portland from Heathrow.

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

Certainly. Search results for flights to Portland from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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Not ready to book yet? You can track prices for flights from Heathrow to Portland on Cheapflights with our Price Alert feature and get notified when better prices are available.

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