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Cheap flights from London to Portland, Maine from £385

LON — PWM
9 Nov — 16 Nov1
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

Thu 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops31h 30m
Deal found 8/10£628
Tue 3/1107:25 -
1 stop21h 18m
Tue 10/1106:30 -
1 stop22h 00m
Deal found 6/10£652
Wed 4/1107:25 -
1 stop21h 18m
Wed 11/1106:30 -
1 stop10h 10m
Deal found 7/10£654
Mon 2/1108:05 -
1 stop20h 38m
Mon 9/1106:30 -
1 stop10h 10m
Deal found 5/10£670
Sun 8/1107:45 -
1 stop20h 58m
Thu 12/1115:41 -
1 stop11h 44m
Deal found 7/10£671
Tue 3/1112:20 -
1 stop16h 23m
Tue 10/1108:49 -
2 stops17h 21m
Deal found 6/10£676
Wed 4/1112:20 -
1 stop16h 23m
Wed 11/1105:50 -
2 stops19h 40m
Deal found 7/10£681
Sun 8/1107:45 -
1 stop20h 58m
Sun 15/1106:30 -
1 stop22h 00m
Deal found 9/10£682
Wed 18/1112:20 -
1 stop16h 23m
Sun 22/1116:03 -
1 stop13h 27m
Deal found 6/10£697

Find flight deals from London to Portland

Round-trip from

£628

One-way from

£385

Popular in

July

Cheapest in

February

Average price

£843
Scandinavian Airlines
  • Scandinavian Airlines
  • 3/12-6/12
  • 4 total stops
  • 54h 11m total
  • London to Portland
Search Deals
30/11-31/12
  • 30/11-31/12
  • 2 total stops
  • 41h 33m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£139 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 October 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

Mon 16/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£433

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 5/11

12:15-09:08

2 stops25h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£474

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 19/11

08:45-09:08

2 stops29h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£505

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 30/11

15:40-11:56

1 stop25h 16m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£536

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

16:45-12:05

2 stops24h 20m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£553

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

£554

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 26/11

18:00-13:26

3 stops24h 26m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£627

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

£628

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 4/11

07:25-23:43

1 stop21h 18m

Portland

Wed 11/11

06:30-21:40

1 stop10h 10m

£654

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 3/11

12:20-23:43

1 stop16h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£661

Flights are sorted by cheapest return flights first.

Deals found on 8/10

Showing 1-10 of 16 resultsSorted by cheapest first
1
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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 £606). Flying from London to Portland, Maine in July is currently the most expensive (average of £1,010). 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 39% 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 £618.

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.

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
10,331 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

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
10,331 reviews
United Airlines
7.4
Good
10,331 reviews
Check prices

Boarding

7.7

Crew

8.1

Food

6.7

Entertainment

7.1

Comfort

7.3

Overall

7.4

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

  • 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 £606). Flying from London to Portland, Maine in July is currently the most expensive (average of £1,010). 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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