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Cheap flights from the United Kingdom to Portland, Maine from £376

LHR — PWM
3 Oct — 10 Oct1
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
Thu 22/1006:04 -
2 stops30h 36m
Deal found 31/8£570
Sat 17/1006:40 -
2 stops22h 30m
Sat 24/1014:33 -
2 stops27h 07m
Deal found 1/9£593
Thu 3/1219:30 -
2 stops33h 51m
Sun 6/1206:00 -
2 stops22h 20m
Deal found 2/9£601
Fri 2/1008:15 -
1 stop20h 39m
Tue 20/1006:00 -
1 stop9h 45m
Deal found 3/9£608
Sun 27/908:15 -
1 stop20h 39m
Sun 4/1006:00 -
1 stop22h 30m
Deal found 30/8£610
Thu 15/1007:05 -
2 stops22h 05m
Wed 21/1006:04 -
2 stops22h 31m
Deal found 30/8£648
Sun 4/1012:10 -
1 stop16h 44m
Sun 11/1006:00 -
1 stop22h 20m
Deal found 30/8£667
Sat 3/1012:10 -
1 stop16h 44m
Sat 17/1006:00 -
1 stop22h 20m
Deal found 30/8£681
Wed 30/906:55 -
2 stops22h 04m
Wed 7/1014:32 -
1 stop11h 23m
Deal found 1/9£729
Sun 27/917:55 -
2 stops30h 29m
Sun 4/1018:55 -
1 stop30h 00m
Deal found 30/8£741
Thu 15/1019:10 -
2 stops34h 00m
Thu 22/1006:04 -
2 stops45h 51m
Deal found 31/8£754
Sun 4/1012:10 -
1 stop16h 44m
Sun 11/1006:00 -
2 stops20h 20m
Deal found 30/8£768

Find flight deals from United Kingdom to Portland

Round-trip from

£570

One-way from

£376

Popular in

July

Cheapest in

December

Average price

£879
Scandinavian Airlines
  • Scandinavian Airlines
  • 15/10-22/10
  • 4 total stops
  • 52h 41m total
  • United Kingdom to Portland
Search Deals
12/1-31/12
  • 12/1-31/12
  • 2 total stops
  • 25h 53m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 25% potential increase in price (£180 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 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

Fri 9/10

06:15-09:08

3 stops31h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£459

EdinburghPortland

EDI Edinburgh Turnhouse - PWM Portland

EDIPWM

Edinburgh Turnhouse

Sun 6/12

09:25-18:47

1 stop14h 22m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£485

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 25/11

12:15-22:39

1 stop15h 24m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£502

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 13/12

10:00-10:14

3 stops53h 14m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£508

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 28/9

13:55-16:24

3 stops31h 29m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£528

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

£544

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sun 3/1

15:50-13:53

1 stop27h 03m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£564

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 15/10

07:05-00:10

2 stops22h 05m

Portland

Thu 22/10

06:04-17:40

2 stops30h 36m

£570

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 17/10

06:40-00:10

2 stops22h 30m

Portland

Sat 24/10

14:33-22:40

2 stops27h 07m

£593

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 12/1

06:40-23:49

2 stops22h 09m

Portland

Tue 19/1

14:35-14:35

3 stops19h 00m

£594

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 37 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 £469). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £991). 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
10,160 reviews
Check prices

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Overall

7.4

Entertainment

7.1

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
10,160 reviews
United Airlines
7.4
Good
10,160 reviews
Check prices

Comfort

7.3

Crew

8.1

Boarding

7.7

Food

6.7

Overall

7.4

Entertainment

7.1

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, United Airlines, and Delta fly from United Kingdom to Portland, Maine in about 19h 36m. The time it takes to get you to your destination can typically vary by up to 13h 21m. The distance between United Kingdom and Portland, Maine is about 2973 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 London Heathrow - Portland or Edinburgh Turnhouse - Portland, Manchester - 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 £469). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £991). 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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