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Cheap flights from London to Portland, Maine from £397

LON — PWM
14 Oct — 21 Oct1
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

Wed 28/1007:25 -
1 stop20h 18m
Wed 4/1106:30 -
1 stop10h 10m
Deal found 12/9£608
Thu 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops31h 30m
Deal found 13/9£622
Wed 28/1007:25 -
1 stop20h 18m
Wed 4/1108:49 -
2 stops17h 21m
Deal found 12/9£653
Mon 12/1011:55 -
1 stop16h 59m
Mon 19/1006:00 -
1 stop9h 45m
Deal found 12/9£658
Sat 10/1008:15 -
1 stop20h 39m
Sat 17/1006:00 -
1 stop9h 45m
Deal found 12/9£670
Mon 12/1011:55 -
1 stop16h 59m
Mon 19/1006:04 -
2 stops20h 36m
Deal found 12/9£702
Thu 15/1008:00 -
2 stops20h 54m
Mon 19/1006:00 -
2 stops19h 35m
Deal found 10/9£710
Wed 28/1009:30 -
2 stops17h 51m
Wed 4/1114:05 -
2 stops14h 05m
Deal found 12/9£728
Mon 26/1009:00 -
2 stops18h 59m
Mon 2/1119:35 -
2 stops20h 00m
Deal found 11/9£738
Mon 12/1009:00 -
2 stops19h 59m
Mon 19/1014:32 -
2 stops15h 48m
Deal found 14/9£741

Find flight deals from London to Portland

Round-trip from

£608

One-way from

£397

Popular in

July

Cheapest in

February

Average price

£812
JetBlue
  • JetBlue
  • 28/10-4/11
  • 2 total stops
  • 30h 28m total
  • London to Portland
Search Deals
10/11-31/12
  • 10/11-31/12
  • 2 total stops
  • 25h 53m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£143 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 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 to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 13/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£411

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 9/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£411

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 14/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£411

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 24/1

12:15-09:08

2 stops25h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£429

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 27/10

12:15-09:08

2 stops24h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£493

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Fri 4/12

15:40-11:53

1 stop25h 13m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£543

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 3/12

06:40-00:21

2 stops22h 41m

Portland

Sun 6/12

06:00-18:30

2 stops31h 30m

£622

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 28/10

09:30-23:21

2 stops17h 51m

Portland

Wed 4/11

14:05-09:10

2 stops14h 05m

£728

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 26/10

09:00-23:59

2 stops18h 59m

Portland

Mon 2/11

19:35-06:40

1 stop30h 05m

£738

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

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

How much does it cost for a return flight from London to Portland, Maine?

Airfare is below average for this route at the moment.
London to Portland, Maine flights typically cost between £791 and £877 in October.
The cheapest return price found within the last 5 days was £608 on JetBlue (28 Oct–4 Nov).

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

Newark (EWR) – chosen by Cheapflights users on 33% of one-stop itineraries from London to Portland, Maine on Cheapflights.

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

Newark (EWR) is the most affordable one-stop option, with an average return flight price of £539.

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

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

Reviews of airlines servicing Portland

Get a feel of what it's like to fly with United Airlines from London to Portland by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,213 reviews
Check prices

Food

6.7

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.
United Airlines
7.4
Good
10,213 reviews
United Airlines
7.4
Good
10,213 reviews
Check prices

Food

6.7

Comfort

7.3

Crew

8.1

Overall

7.4

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Asha,Sept 2026

LGA - IAH

The flight was on time and boardi g was very organized and timely. Snacks are awful and having one little glass of juice was terrible. Fortunately, I had my water to keep me hydrated.

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?

    Scandinavian Airlines and United Airlines can get you from London to Portland, Maine in just under 17h 51m. Your travel time can differ by up to 4h 50m. 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.

See more FAQs

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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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