Find flights
When to book
Airlines
FAQs

Cheap flights from the United Kingdom to Portland, Maine from £389

LHR — PWM
18 Nov — 25 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 3/1219:30 -
2 stops33h 51m
Sun 6/1206:00 -
2 stops29h 00m
Deal found 14/10£623
Wed 11/1112:20 -
1 stop16h 23m
Sat 14/1106:30 -
1 stop10h 10m
Deal found 16/10£648
Fri 13/1112:20 -
1 stop16h 23m
Fri 20/1105:50 -
2 stops34h 10m
Deal found 16/10£704
Wed 11/1112:20 -
1 stop16h 23m
Sat 14/1108:49 -
2 stops17h 21m
Deal found 16/10£731
Wed 2/1206:00 -
2 stops18h 25m
Wed 9/1209:12 -
1 stop16h 08m
Deal found 18/10£735
Tue 1/1212:05 -
2 stops16h 19m
Tue 8/1215:20 -
2 stops14h 55m
Deal found 17/10£740
Mon 30/1119:25 -
2 stops29h 00m
Mon 7/1209:12 -
1 stop16h 08m
Deal found 16/10£741
Wed 9/1212:05 -
2 stops16h 19m
Sun 13/1216:47 -
2 stops32h 53m
Deal found 17/10£743
Thu 12/1106:10 -
2 stops31h 50m
Sun 15/1117:08 -
2 stops36h 12m
Deal found 14/10£838
Thu 12/1122:30 -
2 stops54h 13m
Sun 15/1106:30 -
2 stops33h 55m
Deal found 15/10£848
Fri 20/1109:45 -
2 stops18h 11m
Sun 29/1118:47 -
2 stops35h 48m
Deal found 15/10£921
Sat 28/1106:10 -
2 stops22h 11m
Sat 5/1219:55 -
2 stops33h 25m
Deal found 14/10£992

Find flight deals from United Kingdom to Portland

Round-trip from

£623

One-way from

£389

Popular in

July

Cheapest in

February

Average price

£923
Scandinavian Airlines
  • Scandinavian Airlines
  • 3/12-6/12
  • 4 total stops
  • 62h 51m total
  • United Kingdom to Portland
Search Deals
8/12-31/12
  • 8/12-31/12
  • 2 total stops
  • 25h 53m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£88 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£23 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

Tue 8/12

12:15-09:08

2 stops25h 53m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£389

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 10/12

08:45-09:08

2 stops29h 23m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£407
Fastest return journey

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 15/2

11:10-22:55

2 stops16h 45m

Portland

Wed 31/12

00:00-06:00

Nonstop0h 00m

£555

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

19:30-00:21

2 stops33h 51m

Portland

Sun 6/12

06:00-16:00

2 stops29h 00m

£623

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 30/11

09:00-23:24

2 stops43h 24m

Portland

Mon 7/12

14:15-11:15

2 stops16h 00m

£767

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Thu 3/12

12:05-19:25

2 stops36h 20m

Portland

Sun 6/12

19:55-20:35

1 stop19h 40m

£767

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Mon 30/11

15:40-11:56

1 stop25h 16m

Portland

Mon 7/12

12:44-11:35

1 stop17h 51m

£792

LondonPortland

LHR London Heathrow - PWM Portland

LHRPWM

London Heathrow

Sat 13/2

19:25-18:13

2 stops27h 48m

Portland

Sun 21/2

08:55-20:35

1 stop30h 40m

£793

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Thu 12/11

06:10-09:00

2 stops31h 50m

Portland

Sun 15/11

17:08-10:20

2 stops36h 12m

£838

ManchesterPortland

MAN Manchester - PWM Portland

MANPWM

Manchester

Thu 12/11

22:30-23:43

2 stops54h 13m

Portland

Sun 15/11

06:30-21:25

2 stops33h 55m

£848

Flights are sorted by cheapest return flights first.

Deals found on 18/10

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 £602). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £1,003). 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
10,384 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.7

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
10,384 reviews
United Airlines
7.4
Good
10,384 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Food

6.7

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 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 Turkish Airlines fly from United Kingdom to Portland, Maine in about 16h 19m. The time it takes to get you to your destination can typically vary by up to 37h 54m. 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 Edinburgh Turnhouse - Portland or Manchester - 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 £602). Flying from United Kingdom to Portland, Maine in July is currently the most expensive (average of £1,003). 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

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from United Kingdom to Portland?

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.

Can Cheapflights find flights from United Kingdom to Portland with no change fees?

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

Can Cheapflights notify me if prices for flights from United Kingdom to Portland become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.