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Cheap flights from the United Kingdom to Portland, Maine from £370

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PWM
9 Jun — 16 Jun1
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
Explore the most affordable flight options available from United Kingdom to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 May 2026.

Sun 7/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Sat 13/614:30
PWM
-
LHR
1 stop14h 00m
JetBlue
Deal found 9/5£520
Mon 8/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Tue 22/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 8/5£540
Wed 16/908:15
LHR
-
PWM
1 stop20h 37m
JetBlue
Mon 21/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 7/5£542
Fri 29/508:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Sun 7/606:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 8/5£546
Thu 4/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Thu 11/606:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 7/5£557
Thu 24/908:15
LHR
-
PWM
1 stop20h 37m
JetBlue
Tue 29/906:00
PWM
-
LHR
1 stop9h 45m
JetBlue
Deal found 5/5£613
Mon 22/611:55
LHR
-
PWM
1 stop29h 35m
JetBlue
Mon 29/614:30
PWM
-
LHR
1 stop14h 00m
JetBlue
Deal found 7/5£624
Mon 8/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Mon 15/614:30
PWM
-
LHR
1 stop14h 00m
JetBlue
Deal found 9/5£625
Mon 2/1107:25
LHR
-
PWM
1 stop21h 18m
JetBlue
Fri 6/1106:30
PWM
-
LHR
1 stop22h 00m
JetBlue
Deal found 7/5£629
Sun 7/608:15
LHR
-
PWM
1 stop20h 43m
JetBlue
Sun 14/606:00
PWM
-
LHR
1 stop22h 30m
JetBlue
Deal found 9/5£654
Fri 21/812:10
EDI
-
PWM
1 stop30h 35m
JetBlue
Fri 28/814:49
PWM
-
EDI
1 stop13h 31m
JetBlue
Deal found 10/5£758
Tue 10/1119:10
EDI
-
PWM
2 stops33h 39m
Scandinavian Airlines
Fri 13/1110:00
PWM
-
EDI
2 stops27h 25m
Scandinavian Airlines
Deal found 5/5£763

Find flight deals from United Kingdom to Portland

Keep the following information in mind while searching for United Kingdom to Portland flight deals. Data was last updated 10 May 2026.

Round-trip from

£520

One-way from

£370

Popular in

August

Cheapest in

February

Average price

£628
JetBlue
  • JetBlue
  • 7/6-13/6
  • 2 total stops
  • 34h 43m total
  • United Kingdom to Portland
Search Deals
28/8
  • 28/8
  • 2 total stops
  • 32h 12m total
  • United Kingdom to Portland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from United Kingdom to Portland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 May 2026.
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 - PWM

LHRPWM

London Heathrow

Wed 16/9

07:25-19:19

2 stops16h 54m

Portland

Mon 21/9

15:44-10:25

1 stop13h 41m

£665

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 5/11

07:30-18:13

2 stops15h 43m

Portland

Mon 9/11

14:45-08:25

2 stops12h 40m

£694

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 15/6

07:45-18:35

1 stop15h 50m

Portland

Wed 16/9

10:43-07:15

1 stop15h 32m

£747

EdinburghPortland

EDI - PWM

EDIPWM

Edinburgh Turnhouse

Fri 21/8

12:10-13:45

1 stop30h 35m

Portland

Fri 28/8

14:49-09:20

1 stop13h 31m

£758

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 2/11

11:45-23:49

2 stops17h 04m

Portland

Fri 6/11

14:35-10:15

1 stop14h 40m

£773

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Tue 23/6

13:50-23:30

2 stops14h 40m

Portland

Tue 30/6

15:46-10:40

2 stops13h 54m

£782

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 4/6

18:40-00:43

2 stops35h 03m

Portland

Thu 11/6

06:25-09:35

2 stops22h 10m

£787

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 1/6

06:15-23:09

2 stops21h 54m

Portland

Mon 8/6

06:00-06:20

2 stops19h 20m

£788

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 1/10

13:50-23:27

2 stops14h 37m

Portland

Sun 4/10

19:25-21:35

2 stops21h 10m

£799

ManchesterPortland

MAN - PWM

MANPWM

Manchester

Thu 5/11

09:30-23:59

2 stops19h 29m

Portland

Mon 9/11

14:45-17:00

2 stops21h 15m

£807

Flights are sorted by cheapest return flights first.

Deals found on 10/5

Showing 1-10 of 35 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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, October is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £119). Flying from United Kingdom to Portland, Maine in January is currently the most expensive (average of £588). 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 insights into the airlines that provide service to Portland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portland. Reviews last updated 10 May 2026.
Get a feel of what it's like to fly with KLM,United Airlines, andVirgin Atlantic 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.
KLM
7.8
Good
1,513 reviews
Check prices

Comfort

7.7

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,513 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Comfort

7.7

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,694 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Comfort

7.7

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Virgin Atlantic
7.4
Good
688 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Comfort

7.7

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
JetBlue
7.2
Good
2,976 reviews
KLM
7.8
Good
1,513 reviews
Check prices

Comfort

7.7

Food

7.3

Overall

7.8

Boarding

7.8

Entertainment

7.2

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from United Kingdom to Portland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 United Airlines, JetBlue, and Delta fly from United Kingdom to Portland, Maine in about 16h 54m. The time it takes to get you to your destination can typically vary by up to 13h 41m. 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, October is the cheapest month in which you can book a flight from United Kingdom to Portland, Maine (average of £119). Flying from United Kingdom to Portland, Maine in January is currently the most expensive (average of £588). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 3 airlines flying from United Kingdom to Portland

Discover the top 3 airlines that operate flights from United Kingdom to Portland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£535Average£731FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£557Average£707FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
KLMCheapest£564Average£627FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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!

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