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Cheap flights from the United Kingdom to Portland, Maine from £375

LHR — PWM
21 Oct — 28 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

Tue 10/1107:25 -
1 stop21h 18m
Tue 17/1106:30 -
1 stop10h 10m
Deal found 20/9£582
Tue 3/1112:20 -
1 stop16h 23m
Tue 10/1106:30 -
1 stop10h 10m
Deal found 19/9£607
Tue 10/1107:25 -
1 stop21h 18m
Sat 14/1106:30 -
1 stop10h 10m
Deal found 20/9£608
Sun 1/1108:15 -
1 stop20h 28m
Sun 8/1106:30 -
1 stop22h 00m
Deal found 17/9£611
Thu 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops31h 30m
Deal found 17/9£620
Fri 23/1012:00 -
1 stop13h 22m
Sat 31/1006:00 -
1 stop10h 35m
Deal found 17/9£628
Wed 4/1107:25 -
1 stop21h 18m
Wed 11/1106:30 -
1 stop10h 10m
Deal found 19/9£629
Sat 31/1006:40 -
2 stops21h 30m
Sat 7/1114:33 -
2 stops13h 47m
Deal found 16/9£630
Wed 4/1106:10 -
2 stops32h 57m
Sun 8/1117:08 -
2 stops36h 12m
Deal found 17/9£793
Wed 14/1006:05 -
2 stops19h 17m
Wed 21/1005:15 -
2 stops23h 35m
Deal found 16/9£866
Sat 31/1006:10 -
2 stops37h 06m
Sat 7/1117:08 -
2 stops36h 12m
Deal found 16/9£868
Thu 15/1012:30 -
2 stops15h 58m
Mon 19/1009:50 -
2 stops17h 35m
Deal found 16/9£876

Find flight deals from United Kingdom to Portland

Round-trip from

£582

One-way from

£375

Popular in

July

Cheapest in

February

Average price

£820
JetBlue
  • JetBlue
  • 10/11-17/11
  • 2 total stops
  • 31h 28m total
  • United Kingdom to Portland
Search Deals
9/11-31/12
  • 9/11-31/12
  • 3 total stops
  • 37h 29m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£135 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£28 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

EdinburghPortland

EDI Edinburgh Turnhouse - PWM Portland

EDIPWM

Edinburgh Turnhouse

Thu 12/11

07:30-09:08

3 stops30h 38m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£419
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Wed 25/11

15:10-23:21

1 stop13h 11m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£420

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Sat 14/11

22:25-13:57

3 stops44h 32m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£452

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 20/10

18:45-23:54

2 stops34h 09m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£464

EdinburghPortland

EDI Edinburgh Turnhouse - PWM Portland

EDIPWM

Edinburgh Turnhouse

Wed 11/11

05:40-00:19

2 stops23h 39m

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 26/11

17:50-15:16

2 stops26h 26m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£544

EdinburghPortland

EDI Edinburgh Turnhouse - PWM Portland

EDIPWM

Edinburgh Turnhouse

Tue 10/11

11:05-22:47

1 stop16h 42m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£565

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Tue 10/11

07:25-23:43

1 stop21h 18m

Portland

Tue 17/11

06:30-21:40

1 stop10h 10m

£607

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Sat 14/11

12:40-23:31

1 stop15h 51m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£608

Flights are sorted by cheapest return flights first.

Deals found on 19/9

Showing 1-10 of 27 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

No data available for this route at this time. Please check back soon.

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
10,227 reviews
Check prices

Overall

7.4

Food

6.7

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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
10,227 reviews
United Airlines
7.4
Good
10,227 reviews
Check prices

Overall

7.4

Food

6.7

Crew

8.1

Entertainment

7.1

Boarding

7.7

Comfort

7.3

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 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 JetBlue, Scandinavian Airlines, and United Airlines fly from United Kingdom to Portland, Maine in about 21h 18m. The time it takes to get you to your destination can typically vary by up to 11h 39m. 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 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.

See more FAQs

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from United Kingdom to Portland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from United Kingdom to Portland?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from United Kingdom to Portland.

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Yes! Cheapflights helps users easily find flights from United Kingdom to Portland with no change fees.

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