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Cheap flights from the United Kingdom to Portland, Maine from £378

LHR — PWM
4 Nov — 11 Nov1
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 3/1206:40 -
2 stops22h 41m
Sun 6/1206:00 -
2 stops31h 30m
Deal found 1/10£596
Fri 30/1012:20 -
1 stop15h 23m
Fri 6/1106:30 -
1 stop22h 00m
Deal found 1/10£610
Fri 13/1112:20 -
1 stop16h 23m
Mon 16/1106:30 -
1 stop10h 10m
Deal found 2/10£652
Fri 13/1112:25 -
2 stops16h 18m
Mon 16/1106:30 -
2 stops30h 00m
Deal found 2/10£664
Fri 30/1008:05 -
1 stop19h 38m
Fri 6/1105:50 -
2 stops19h 40m
Deal found 1/10£671
Thu 5/1112:20 -
1 stop16h 23m
Fri 13/1116:03 -
1 stop11h 02m
Deal found 2/10£673
Mon 2/1106:10 -
2 stops20h 41m
Mon 9/1109:46 -
2 stops19h 34m
Deal found 5/10£815
Thu 12/1106:10 -
2 stops31h 50m
Sun 15/1117:08 -
2 stops36h 12m
Deal found 1/10£824
Mon 2/1114:55 -
1 stop14h 15m
Mon 9/1116:50 -
2 stops14h 55m
Deal found 5/10£889
Sat 14/1106:10 -
2 stops31h 50m
Sat 21/1115:41 -
2 stops36h 19m
Deal found 30/9£905
Sat 10/1022:55 -
2 stops29h 59m
Wed 14/1006:00 -
2 stops46h 35m
Deal found 1/10£1,045
Mon 2/1114:55 -
1 stop14h 15m
Mon 9/1106:00 -
1 stop22h 40m
Deal found 5/10£1,321

Find flight deals from United Kingdom to Portland

Round-trip from

£596

One-way from

£378

Popular in

July

Cheapest in

February

Average price

£843
Scandinavian Airlines
  • Scandinavian Airlines
  • 3/12-6/12
  • 4 total stops
  • 54h 11m total
  • United Kingdom to Portland
Search Deals
7/1-31/12
  • 7/1-31/12
  • 3 total stops
  • 46h 03m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£139 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% 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 the United Kingdom to Portland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 5/11

07:25-23:43

1 stop21h 18m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£413

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Fri 8/1

06:55-11:48

3 stops33h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£432

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Tue 5/1

11:55-09:08

2 stops26h 13m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£447

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Wed 6/1

17:00-09:08

2 stops45h 08m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£464

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 14/12

16:00-18:07

1 stop31h 07m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£523

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

Thu 26/11

16:45-12:05

2 stops24h 20m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£556

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Tue 5/1

09:05-23:49

2 stops19h 44m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£581

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Mon 4/1

09:05-23:49

2 stops19h 44m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£582
Fastest return journey

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Tue 5/1

12:40-22:23

1 stop14h 43m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£586

Flights are sorted by cheapest return flights first.

Deals found on 1/10

Showing 1-10 of 26 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, January is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £606). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £1,009). 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
10,282 reviews
Check prices

Entertainment

7.1

Food

6.7

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

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
10,282 reviews
United Airlines
7.4
Good
10,282 reviews
Check prices

Entertainment

7.1

Food

6.7

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

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 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 16m. The time it takes to get you to your destination can typically vary by up to 6h 25m. 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, January is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £606). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £1,009). 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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