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Cheap flights from the United Kingdom to Portland, Maine from £369

LHR — PWM
22 Sep — 29 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from United Kingdom to Portland

Enter your travel dates to find the best prices.

Cheapest flights from United Kingdom to Portland

Thu 15/1007:05 -
2 stops22h 05m
Wed 21/1006:04 -
2 stops22h 31m
Deal found 18/8£537
Mon 21/920:25 -
2 stops32h 31m
Tue 29/906:02 -
2 stops25h 03m
Deal found 19/8£550
Sat 17/1006:40 -
2 stops22h 30m
Sat 24/1014:33 -
2 stops21h 27m
Deal found 20/8£583
Tue 13/1019:10 -
2 stops34h 00m
Wed 21/1006:04 -
2 stops25h 01m
Deal found 20/8£621
Fri 2/1008:15 -
1 stop20h 39m
Fri 9/1006:00 -
1 stop9h 45m
Deal found 18/8£632
Tue 15/921:25 -
2 stops31h 29m
Sat 19/906:00 -
2 stops24h 55m
Deal found 22/8£643
Thu 15/1008:15 -
1 stop20h 37m
Mon 19/1006:00 -
1 stop9h 45m
Deal found 18/8£661
Thu 15/1008:15 -
1 stop20h 37m
Wed 21/1006:00 -
1 stop9h 45m
Deal found 21/8£662
Fri 16/1008:15 -
1 stop20h 37m
Mon 26/1006:30 -
1 stop10h 15m
Deal found 20/8£663
Mon 12/1007:05 -
2 stops22h 05m
Wed 21/1006:04 -
2 stops22h 31m
Deal found 22/8£668
Wed 4/1106:10 -
2 stops22h 11m
Sun 8/1119:30 -
2 stops33h 50m
Deal found 20/8£792
Mon 5/1010:35 -
2 stops33h 03m
Mon 12/1019:25 -
2 stops33h 25m
Deal found 21/8£797

Find flight deals from United Kingdom to Portland

Round-trip from

£537

One-way from

£369

Popular in

July

Cheapest in

December

Average price

£980
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/10-21/10
  • 4 total stops
  • 44h 36m total
  • United Kingdom to Portland
Search Deals
2/10
  • 2/10
  • 2 total stops
  • 31h 38m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£175 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Mon 21/9

20:25-23:56

2 stops32h 31m

Portland

Tue 29/9

06:02-12:05

2 stops25h 03m

£550

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 15/10

07:05-00:10

2 stops22h 05m

Portland

Wed 21/10

06:04-09:20

3 stops22h 16m

£585

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 17/10

06:40-00:10

2 stops22h 30m

Portland

Sat 24/10

14:33-19:50

3 stops24h 17m

£591

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Tue 13/10

19:10-00:10

2 stops34h 00m

Portland

Wed 21/10

06:04-12:05

2 stops25h 01m

£621

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 12/10

07:05-00:10

2 stops22h 05m

Portland

Wed 21/10

06:04-09:35

2 stops22h 31m

£668
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 6/10

07:25-19:24

2 stops16h 59m

Portland

Tue 13/10

14:32-06:55

1 stop11h 23m

£727

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 7/9

06:55-19:24

2 stops17h 29m

Portland

Mon 21/9

14:38-11:55

2 stops16h 17m

£741

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 12/10

07:25-19:24

2 stops16h 59m

Portland

Wed 21/10

15:41-10:25

1 stop13h 44m

£741

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 4/10

07:30-19:24

2 stops16h 54m

Portland

Sun 11/10

15:41-20:40

1 stop23h 59m

£754

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 15/10

12:10-23:28

2 stops16h 18m

Portland

Wed 21/10

17:08-11:55

1 stop13h 47m

£762

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 30 resultsSorted by cheapest first
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Best time to book a flight from United Kingdom to Portland

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

Cheapflights Insights

Everything you need to know about your flight from the United Kingdom to Portland

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

Currently, December is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £464). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £980). 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.

Reviews of airlines servicing Portland

Get a feel of what it's like to fly with United Airlines from the United Kingdom 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
10,112 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!
United Airlines
7.4
Good
10,112 reviews
United Airlines
7.4
Good
10,112 reviews
Check prices

Boarding

7.7

Overall

7.4

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Reviews

1 / 20
4.0
Okay

Chris,Aug 2026

MIA - ORD

Had to go through TSA again, already purchased bottle drink. TSA would not let through, United changed gates last minute. This experience bad for everyone. Staff rude, not our fault. Staff from Chicago to Wichita excellent!

Related info for your journey

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

    If you book a flight to Portland from United Kingdom, 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.

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

    Airlines like Scandinavian Airlines and United Airlines fly from United Kingdom to Portland, Maine in about 16h 59m. The time it takes to get you to your destination can typically vary by up to 15h 32m. The distance between United Kingdom and Portland, Maine is about 3173 mi. This flight may include one or multiple stops.

  • What are the most popular routes from United Kingdom to Portland, Maine?

    While some choose either Manchester - Portland or Edinburgh Turnhouse - Portland, London Heathrow - Portland is the most popular route from United Kingdom to Portland, Maine.

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

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

  • How can I find direct flights from United Kingdom to Portland?

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

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

    Yes. Cheapflights offers flight deals from United Kingdom 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 United Kingdom to Portland, Maine?

    Currently, December is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £464). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £980). 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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