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Cheap flights from London to Portland, Maine from £381

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PWM
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to Portland

Enter your travel dates to find the best prices.

Cheapest flights from London to Portland
Explore the most affordable flight options available from London to Portland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 January 2026.

Fri 15/511:55
LHR
-
PWM
1 stop30h 28m
JetBlue
Sun 17/514:18
PWM
-
LHR
1 stop25h 27m
JetBlue
Deal found 27/1£486
Thu 5/211:20
LHR
-
PWM
2 stops17h 23m
American Airlines
Mon 9/215:58
PWM
-
LHR
2 stops35h 32m
American Airlines
Deal found 25/1£499
Mon 5/1011:45
LHR
-
PWM
2 stops17h 14m
Delta
Mon 12/1018:45
PWM
-
LHR
1 stop13h 30m
Delta
Deal found 26/1£546
Thu 5/210:45
LHR
-
PWM
1 stop16h 42m
KLM
Mon 9/214:35
PWM
-
LHR
1 stop14h 40m
KLM
Deal found 25/1£559
Fri 6/211:45
LHR
-
PWM
2 stops17h 35m
Delta
Mon 9/214:35
PWM
-
LHR
1 stop10h 45m
Delta
Deal found 25/1£564
Fri 15/511:45
LHR
-
PWM
2 stops17h 14m
Delta
Sun 17/514:35
PWM
-
LHR
1 stop19h 00m
Delta
Deal found 27/1£576
Fri 6/210:45
LHR
-
PWM
1 stop16h 42m
Multiple Airlines
Mon 9/214:35
PWM
-
LHR
1 stop12h 30m
Multiple Airlines
Deal found 25/1£577
Sat 14/306:50
LHR
-
PWM
2 stops15h 35m
United Airlines
Sat 21/314:32
PWM
-
LHR
1 stop16h 18m
United Airlines
Deal found 27/1£624
Thu 12/306:40
LHR
-
PWM
2 stops21h 19m
Scandinavian Airlines
Thu 19/314:30
PWM
-
LHR
3 stops24h 20m
Scandinavian Airlines
Deal found 26/1£625
Thu 5/212:05
LHR
-
PWM
2 stops16h 25m
United Airlines
Mon 9/215:12
PWM
-
LHR
2 stops14h 38m
United Airlines
Deal found 25/1£629
Thu 29/1009:00
LHR
-
PWM
2 stops29h 44m
United Airlines
Sat 14/1106:00
PWM
-
LHR
1 stop10h 20m
United Airlines
Deal found 28/1£633

Find flight deals from London to Portland

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Portland (PWM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 January 2026.

Round-trip from

£486

One-way from

£381

Popular in

December

Cheapest in

October

Average price

£557
JetBlue
  • JetBlue
  • 15/5-17/5
  • 2 total stops
  • 55h 55m total
  • London to Portland
Search Deals
JetBlue
  • JetBlue
  • 29/4
  • 1 total stop
  • 20h 21m total
  • London to Portland
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£10 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 January 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from London 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 28 January 2026.
Use the filters below to find and compare flights from London to Portland that are best for you.

Fly from

London

Fly to

Portland

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 15/5

11:55-13:23

1 stop30h 28m

Portland

Sun 17/5

14:18-20:45

1 stop25h 27m

£486

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 12/3

10:45-23:22

1 stop16h 37m

Portland

Thu 19/3

14:30-10:15

1 stop15h 45m

£559

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 12/3

08:40-23:59

2 stops19h 19m

Portland

Thu 19/3

16:48-10:15

2 stops13h 27m

£564

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 15/5

11:45-23:59

2 stops17h 14m

Portland

Sun 17/5

14:35-14:35

1 stop19h 00m

£576

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 15/5

13:05-23:36

2 stops15h 31m

Portland

Sun 17/5

06:00-20:20

2 stops33h 20m

£577

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 14/3

06:50-18:25

2 stops15h 35m

Portland

Sat 21/3

14:32-10:50

1 stop16h 18m

£624

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 12/3

06:40-23:59

2 stops21h 19m

Portland

Thu 19/3

14:30-18:50

3 stops24h 20m

£625

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Mon 20/7

10:25-21:27

2 stops16h 02m

Portland

Mon 3/8

06:00-21:35

1 stop10h 35m

£919

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 29/4

08:15-23:36

1 stop20h 21m

£381

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 29/4

11:45-00:46

2 stops18h 01m

£418

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Showing 1-10 of 15 results
1
2

Best time to book a flight from London to Portland

Have a flexible travel schedule? Discover the best time to fly to Portland from London 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 London to Portland

What is the cheapest month to book a flight from London to Portland, Maine?

Currently, July is the cheapest month in which you can book a flight from London to Portland, Maine (average of £136). Flying from London to Portland, Maine in December is currently the most expensive (average of £361). 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.

How much does it cost for a return flight from London to Portland, Maine?

What’s the top stopover airport for flights from London to Portland, Maine?

Share of one-stop return flights from London to Portland, Maine chosen by Cheapflights users in the past 12 months, using the same stopover each way.

New York (JFK) – chosen by Cheapflights users on 50% of one-stop itineraries from London to Portland, Maine on Cheapflights.

What’s the cheapest stopover airport for flights from London to Portland, Maine?

Average return fare for one-stop flights from London to Portland, Maine, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

New York (JFK) is the most affordable one-stop option, with an average return flight price of £580.

What’s the fastest stopover option from London to Portland, Maine?

Shortest average travel time for one-stop one-way flights from London to Portland, Maine, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 11h 35m.

Which airport typically offers the quickest stopover for flights from London to Portland, Maine?

Average stopover duration for one-stop one-way flights from London to Portland, Maine, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 33m.

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 28 January 2026.
Get a feel of what it's like to fly with KLM, Finnair, andUnited Airlines from London 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
7.7
Good
1,443 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Finnair
7.6
Good
1,356 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,215 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
JetBlue
7.2
Good
2,892 reviews
KLM
7.7
Good
1,443 reviews
Check prices

Food

7.3

Entertainment

7.1

Boarding

7.8

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

Related info for your journey

Find useful and relevant information for your journey from London 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 London?

    If you book a flight to Portland from London, 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. There are 0 flights from London to Portland per day from 6 different airlines.

  • How long is the flight from London to Portland, Maine?

    JetBlue, KLM, and Delta can get you from London to Portland, Maine in just under 16h 37m. Your travel time can differ by up to 13h 51m. The distance between London and Portland, Maine is about 3173 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London to Portland, Maine round-trip?

    Currently priced at £140, JetBlue will fly you from London to Portland, Maine and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Finnair and Virgin Atlantic - these airlines can fly you to your destination from £461 and £461, respectively. JetBlue is 77% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from London to Portland that include hotel bookings?

    Yes. In addition to deals on London to Portland flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from London to Portland?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Portland.

  • Can I find deals for business class flights from London to Portland?

    Yes. Cheapflights offers flight deals from London 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 London to Portland, Maine?

    Currently, July is the cheapest month in which you can book a flight from London to Portland, Maine (average of £136). Flying from London to Portland, Maine in December is currently the most expensive (average of £361). 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

Travelling to a place near Portland?

Book flights to Portland if you plan to visit one of these locations
Bath

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from London to Portland

Discover the top 6 airlines that operate flights from London 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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£140Average£515FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
FinnairCheapest£461Average£621FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£461Average£540FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
IcelandairCheapest£478Average£628FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
KLMCheapest£489Average£606FlexibilityNo cancel feeOn-time75%
Search KLM flights
United AirlinesCheapest£544Average£708FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 London to Portland?

When you search for this flight from London to Portland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights helps you find that perfect flight to Portland from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Need flexible booking options for your flight to Portland from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

Of course! You can now track prices for flights from London to Portland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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