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Cheap flights from London Heathrow Airport to Portland, Maine from £473

LHR — PWM
24 Nov — 1 Dec1
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 2/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops30h 40m
Deal found 20/10£626
Thu 5/1112:20 -
1 stop16h 23m
Mon 9/1106:30 -
1 stop10h 10m
Deal found 21/10£704
Wed 2/1212:05 -
2 stops16h 19m
Sun 6/1219:55 -
1 stop20h 25m
Deal found 20/10£761
Tue 8/1209:30 -
2 stops14h 42m
Tue 15/1215:20 -
2 stops14h 30m
Deal found 24/10£768
Sun 6/1217:30 -
2 stops30h 42m
Sun 13/1219:55 -
1 stop20h 25m
Deal found 22/10£791
Tue 8/1212:00 -
1 stop12h 25m
Tue 15/1209:12 -
1 stop18h 58m
Deal found 24/10£792
Wed 23/1212:00 -
1 stop11h 30m
Wed 30/1206:00 -
1 stop10h 20m
Deal found 20/10£814
Sat 21/1112:05 -
2 stops16h 16m
Sat 28/1114:05 -
2 stops16h 10m
Deal found 24/10£820

Find flight deals from Heathrow to Portland

Round-trip from

£626

One-way from

£473

Popular in

August

Cheapest in

April

Average price

£942
Scandinavian Airlines
  • Scandinavian Airlines
  • 2/12-6/12
  • 4 total stops
  • 53h 21m total
  • London to Portland
Search Deals
2/11-31/12
  • 2/11-31/12
  • 3 total stops
  • 37h 09m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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

Wed 23/12

18:30-09:08

2 stops43h 38m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£563

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 2/11

20:35-09:08

2 stops41h 33m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£572

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 5/12

09:00-23:24

2 stops19h 24m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£595

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 2/12

06:40-00:21

2 stops22h 41m

Portland

Sun 6/12

06:00-17:40

2 stops30h 40m

£626

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 23/12

20:10-13:26

1 stop22h 16m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£705

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 2/12

12:05-23:24

2 stops16h 19m

Portland

Sun 6/12

19:55-21:20

1 stop20h 25m

£761

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 8/12

06:00-19:25

2 stops18h 25m

Portland

Tue 15/12

09:12-06:20

1 stop16h 08m

£764

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 2/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£788

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 21/11

12:05-23:21

2 stops16h 16m

Portland

Sat 28/11

08:45-05:55

1 stop16h 10m

£823
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 17/1

12:15-21:45

2 stops14h 30m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£1,966

Flights are sorted by cheapest return flights first.

Deals found on 21/10

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

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £545). Flying from London Heathrow Airport to Portland, Maine in August is currently the most expensive (average of £976). 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.

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 can get you from London Heathrow Airport to Portland, Maine in just under 22h 41m. Your travel time can differ by up to . The distance from London Heathrow Airport to Portland, Maine is about 3173 mi.

  • 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.

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

    Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Portland, Maine (average of £545). Flying from London Heathrow Airport to Portland, Maine in August is currently the most expensive (average of £976). 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

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
Southend to Boston flights
Heathrow to Bangor 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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