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

American Airlines, Delta, and Virgin Atlantic can get you from London to Portland, Maine in just under 17h 04m. Your travel time can differ by up to 2h 45m. 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 £379, Icelandair will fly you from London to Portland, Maine and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Virgin Atlantic - these airlines can fly you to your destination from £394 and £465, respectively. Icelandair is 41% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from London to Portland, Maine?

Travellers seeking maximum savings on their London to Portland, Maine flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Portland, Maine ranges from 73.0 - 115.0 inches per month. November is typically the wettest month, when rainfall can reach 115.0 mm. August is typically the driest time to visit Portland, Maine when rainfall is around 73.0 mm.

If weather is an important factor for your trip to Portland, Maine, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 20.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -5.0 C).

What are the most popular airlines that fly from London to Portland, Maine?

Finnair, JetBlue and Icelandair are the most popular airlines when flying from London to Portland, Maine.

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.

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.

£435+ Cheap Flights from London to Portland, Maine

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

Airfare is below average for this route at the moment. London to Portland, Maine flights typically cost between £515 and £595 in February. The cheapest return flight price found within the last 3 days was £468 on American Airlines (28 Feb-3 Mar).

Cheap flight deals from London to Portland

Round-trip from	£468
One-way from	£435
Popular in	October
Cheapest in	February
Average price	£547

American Airlines
28/2-3/3
3 total stops
26h 28m total
London to Portland

Search Deals

28/11
1 total stop
14h 44m total
London to Portland

Search Deals

High demand for flights, 1% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from London to Portland

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 16 September 2025.

Wed 29/1006:30LHR - PWM

2 stops19h 49mVirgin Atlantic

Mon 10/1113:25PWM - LHR

2 stops15h 50mVirgin Atlantic

Deal found 14/9£475

Wed 29/1011:45LHR - PWM

1 stop14h 25mMultiple Airlines

Mon 10/1107:02PWM - LHR

1 stop19h 18mMultiple Airlines

Deal found 14/9£488

Sat 27/908:40LHR - PWM

2 stops20h 54mDelta

Mon 6/1014:38PWM - LHR

1 stop15h 47mDelta

Deal found 15/9£495

Thu 30/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Thu 6/1119:44PWM - LHR

1 stop10h 21mUnited Airlines

Deal found 15/9£547

Fri 31/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Fri 7/1114:20PWM - LHR

1 stop11h 20mUnited Airlines

Deal found 16/9£549

Wed 29/1018:00LHR - PWM

3 stops23h 36mAir Canada

Mon 10/1106:00PWM - LHR

3 stops19h 30mAir Canada

Deal found 14/9£587

Sun 21/908:15LHR - PWM

1 stop18h 52mJetBlue

Sat 27/914:17PWM - LHR

1 stop25h 28mJetBlue

Deal found 15/9£737

Best flights from London to Portland
Discover carefully curated flight deals from London to Portland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2025.

Sat 28/211:40LHR - PWM

2 stops17h 04mAmerican Airlines

Tue 3/313:16PWM - LHR

2 stops14h 59mAmerican Airlines

Deal found 15/9£468

Wed 29/1008:40LHR - PWM

2 stops19h 25mDelta

Mon 10/1116:53PWM - LHR

1 stop10h 52mDelta

Deal found 14/9£475

Wed 29/1006:30LHR - PWM

2 stops19h 49mVirgin Atlantic

Mon 10/1113:25PWM - LHR

2 stops15h 50mVirgin Atlantic

Deal found 14/9£475

Wed 29/1011:45LHR - PWM

1 stop14h 25mMultiple Airlines

Mon 10/1107:02PWM - LHR

1 stop19h 18mMultiple Airlines

Deal found 14/9£488

Thu 30/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Thu 6/1119:44PWM - LHR

1 stop10h 21mUnited Airlines

Deal found 15/9£547

Sat 27/908:40LHR - PWM

2 stops20h 54mDelta

Mon 6/1014:38PWM - LHR

1 stop15h 47mDelta

Deal found 15/9£495

Fri 31/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Fri 7/1114:20PWM - LHR

1 stop11h 20mUnited Airlines

Deal found 16/9£549

Last-minute flights from London to Portland
Discover last-minute flight deals from London to Portland. Data last updated 16 September 2025 and is based on user searches.

Sun 21/908:15LHR - PWM

1 stop18h 52mJetBlue

Sat 27/914:17PWM - LHR

1 stop25h 28mJetBlue

Deal found 15/9£737

Sat 27/908:40LHR - PWM

2 stops20h 54mDelta

Mon 6/1014:38PWM - LHR

1 stop15h 47mDelta

Deal found 15/9£495

Wed 29/1006:30LHR - PWM

2 stops19h 49mVirgin Atlantic

Mon 10/1113:25PWM - LHR

2 stops15h 50mVirgin Atlantic

Deal found 14/9£475

Wed 29/1011:45LHR - PWM

1 stop14h 25mMultiple Airlines

Mon 10/1107:02PWM - LHR

1 stop19h 18mMultiple Airlines

Deal found 14/9£488

Wed 29/1018:00LHR - PWM

3 stops23h 36mAir Canada

Mon 10/1106:00PWM - LHR

3 stops19h 30mAir Canada

Deal found 14/9£587

Thu 30/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Thu 6/1119:44PWM - LHR

1 stop10h 21mUnited Airlines

Deal found 15/9£547

Fri 31/1006:35LHR - PWM

2 stops21h 24mUnited Airlines

Fri 7/1114:20PWM - LHR

1 stop11h 20mUnited Airlines

Deal found 16/9£549

One-way flights from London to Portland
Search for one-way flight options from London to Portland. Find affordable one-way fares based on user searches. Data last updated 16 September 2025.

Fri 28/1113:10LHR - PWM

1 stop14h 44mMultiple Airlines

Deal found 14/9£435

Fri 28/1111:45LHR - PWM

2 stops17h 09mDelta

Deal found 14/9£443

Fri 10/1021:25LHR - PWM

3 stops44h 41mMultiple Airlines

Deal found 15/9£1,525

Fri 10/1008:15LHR - PWM

1 stop19h 49mJetBlue

Deal found 15/9£1,990

Fly from

Fly to

Route

Depart

Return

Price

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 28/2

11:40-23:44

2 stops17h 04m

Portland

Tue 3/3

13:16-09:15

2 stops14h 59m

£468

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 29/10

08:40-00:05

2 stops19h 25m

Portland

Mon 10/11

16:53-08:45

1 stop10h 52m

£475

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 29/10

06:30-22:19

2 stops19h 49m

Portland

Mon 10/11

13:25-10:15

2 stops15h 50m

£475

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Wed 29/10

11:45-22:10

1 stop14h 25m

Portland

Mon 10/11

07:02-07:20

1 stop19h 18m

£488

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Sat 27/9

08:40-00:34

2 stops20h 54m

Portland

Mon 6/10

14:38-11:25

1 stop15h 47m

£495

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Thu 30/10

06:35-23:59

2 stops21h 24m

Portland

Thu 6/11

19:44-11:05

1 stop10h 21m

£547

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 31/10

06:35-23:59

2 stops21h 24m

Portland

Fri 7/11

14:20-06:40

1 stop11h 20m

£549

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 28/11

13:10-22:54

1 stop14h 44m

£435

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 28/11

11:45-23:54

2 stops17h 09m

£443

LondonPortland

LHR - PWM

LHRPWM

London Heathrow

Fri 10/10

21:25-13:06

3 stops44h 41m

£1,525

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 11 results

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 time of day to fly from LON to PWM?

It’s typically best to fly out from London to Portland, Maine in the evening. Doing so could potentially save you 24% on the flight price compared to flying in the afternoon, which is usually more expensive.

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?

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?

Chicago (ORD) is the most affordable one-stop option, with an average return flight price of £465.

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

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 11h 50m.

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

Flights via Chicago (ORD) offer the fastest connection on this route, with an average stopover time of 1h 10m.

Reviews of airlines servicing Portland

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

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,385 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Finnair

7.6

Good

1,323 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

United Airlines

7.4

Good

8,929 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

JetBlue

7.2

Good

2,912 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Lufthansa

6.8

Okay

7,407 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

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?
American Airlines, Delta, and Virgin Atlantic can get you from London to Portland, Maine in just under 17h 04m. Your travel time can differ by up to 2h 45m. 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 £379, Icelandair will fly you from London to Portland, Maine and back. In addition to Icelandair, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from JetBlue and Virgin Atlantic - these airlines can fly you to your destination from £394 and £465, respectively. Icelandair is 41% 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.

See more FAQs

Bath

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for London to Portland

Direct flights to United States

Top 6 airlines flying from London to Portland

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£379	Average£584	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
JetBlue	Cheapest£394	Average£574	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Virgin Atlantic	Cheapest£465	Average£635	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Finnair	Cheapest£466	Average£575	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£477	Average£612	FlexibilityNo cancel fee	On-time75%	Search KLM flights
United Airlines	Cheapest£549	Average£727	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

Fly with Cheapflights

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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Cheap flights from London to Portland, Maine from £435

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 28/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from London to Portland

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Portland

Cheapest flights from London to PortlandExplore 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 16 September 2025.

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 16 September 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from London to Portland that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from London to Portland

What is the cheapest time of day to fly from LON to PWM?

Find hourly flight availability from London to Portland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2025.

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.

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.

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.

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.

Reviews of airlines servicing Portland

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.

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?

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

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

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

How can I find direct flights from London to Portland?

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

Travelling to a place near Portland?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Portland

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from London to Portland

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?

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

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

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

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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 16 September 2025.