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

There are many flights that can get you from Portland, Maine to London in 26h 05m. Fly via Scandinavian Airlines to get the fastest option. The distance between Portland, Maine and London is about 3173 mi.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Portland, Maine to London?

The most popular flight routes from Portland, Maine to London are Portland - London Heathrow, Portland - London Gatwick and Portland - London City.

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

When flying from Portland, Maine to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Portland to London?

Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

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

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

How can I find direct flights from Portland to London?

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

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

Yes. Cheapflights offers flight deals from Portland to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£202+ Flights from Portland, Maine to London

Cheap flight deals from Portland to London

Enter your travel dates to find the best prices.

Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 December 2025.

Mon 8/1215:55PWM - LHR

1 stop10h 55mMultiple Airlines

Fri 12/1210:05LHR - PWM

1 stop13h 10mMultiple Airlines

Deal found 7/12£943

Mon 8/1218:40PWM - LHR

2 stops13h 45mAmerican Airlines

Fri 12/1210:05LHR - PWM

1 stop13h 10mAmerican Airlines

Deal found 7/12£947

Mon 8/1209:46PWM - LGW

2 stops20h 09mMultiple Airlines

Fri 12/1214:00LGW - PWM

1 stop25h 36mMultiple Airlines

Deal found 6/12£967

Mon 8/1209:46PWM - LGW

2 stops20h 09mMultiple Airlines

Thu 11/1214:00LGW - PWM

1 stop24h 06mMultiple Airlines

Deal found 6/12£1,236

Mon 8/1219:46PWM - LGW

2 stops14h 59mMultiple Airlines

Wed 10/1210:40LGW - PWM

3 stops27h 30mMultiple Airlines

Deal found 6/12£1,243

Mon 8/1206:15PWM - LHR

2 stops28h 45mScandinavian Airlines

Thu 11/1206:40LHR - PWM

3 stops22h 19mScandinavian Airlines

Deal found 6/12£1,353

Mon 8/1215:00PWM - LHR

2 stops12h 30mMultiple Airlines

Thu 11/1209:00LHR - PWM

3 stops19h 09mMultiple Airlines

Deal found 6/12£1,823

Mon 8/1210:35PWM - LHR

3 stops19h 45mAir Canada

Thu 11/1209:00LHR - PWM

3 stops19h 09mAir Canada

Deal found 6/12£1,826

Mon 8/1218:40PWM - LCY

2 stops13h 00mMultiple Airlines

Fri 12/1206:50LCY - PWM

2 stops16h 25mMultiple Airlines

Deal found 6/12£1,904

Mon 8/1214:34PWM - LHR

3 stops23h 16mScandinavian Airlines

Wed 10/1206:40LHR - PWM

3 stops22h 19mScandinavian Airlines

Deal found 6/12£2,369

Sat 6/1210:15PWM - LHR

1 stop17h 55mAustrian Airlines

Fri 12/1212:00LHR - PWM

1 stop11h 42mAustrian Airlines

Deal found 5/12£7,986

Sat 6/1210:15PWM - LHR

2 stops15h 55mAir Canada

Fri 12/1212:00LHR - PWM

2 stops16h 09mAir Canada

Deal found 5/12£7,991

Best flights from Portland to London
Discover carefully curated flight deals from Portland to London that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 8 December 2025.

Wed 21/114:35PWM - LHR

2 stops26h 05mScandinavian Airlines

Wed 28/106:40LHR - PWM

2 stops22h 40mScandinavian Airlines

Deal found 7/12£430

Wed 21/105:30PWM - LHR

1 stop21h 20mVirgin Atlantic

Wed 28/106:30LHR - PWM

2 stops20h 57mVirgin Atlantic

Deal found 7/12£472

Wed 21/106:16PWM - LHR

1 stop20h 49mKLM

Wed 28/112:40LHR - PWM

1 stop16h 40mKLM

Deal found 7/12£488

Sun 10/517:30PWM - LHR

1 stop12h 00mAmerican Airlines

Sat 16/509:15LHR - PWM

1 stop18h 12mAmerican Airlines

Deal found 5/12£543

Wed 21/112:45PWM - LGW

2 stops17h 10mMultiple Airlines

Wed 28/111:55LGW - PWM

2 stops15h 20mMultiple Airlines

Deal found 7/12£723

Tue 20/114:35PWM - LHR

2 stops22h 05mScandinavian Airlines

Tue 27/106:40LHR - PWM

2 stops22h 40mScandinavian Airlines

Deal found 6/12£451

Tue 20/105:30PWM - LHR

1 stop21h 20mVirgin Atlantic

Tue 27/106:30LHR - PWM

2 stops20h 57mVirgin Atlantic

Deal found 6/12£472

Tue 20/112:45PWM - LGW

2 stops17h 10mMultiple Airlines

Tue 27/111:55LGW - PWM

2 stops15h 20mMultiple Airlines

Deal found 6/12£726

Fri 10/406:00PWM - LGW

2 stops21h 55mMultiple Airlines

Sat 18/419:50LGW - PWM

2 stops46h 33mMultiple Airlines

Deal found 7/12£1,033

Fri 10/414:30PWM - LCY

2 stops16h 10mDelta

Sat 18/412:10LCY - PWM

2 stops16h 49mDelta

Deal found 7/12£3,874

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated 8 December 2025 and is based on user searches.

Mon 8/1209:46PWM - LGW

2 stops20h 09mMultiple Airlines

Fri 12/1214:00LGW - PWM

1 stop25h 36mMultiple Airlines

Deal found 6/12£967

Mon 8/1209:46PWM - LGW

2 stops20h 09mMultiple Airlines

Thu 11/1214:00LGW - PWM

1 stop24h 06mMultiple Airlines

Deal found 6/12£1,236

Mon 8/1219:46PWM - LGW

2 stops14h 59mMultiple Airlines

Wed 10/1210:40LGW - PWM

3 stops27h 30mMultiple Airlines

Deal found 6/12£1,243

Tue 20/114:35PWM - LHR

2 stops22h 05mScandinavian Airlines

Tue 27/106:40LHR - PWM

2 stops22h 40mScandinavian Airlines

Deal found 6/12£451

Tue 20/105:30PWM - LHR

1 stop21h 20mVirgin Atlantic

Tue 27/106:30LHR - PWM

2 stops20h 57mVirgin Atlantic

Deal found 6/12£472

Tue 20/114:35PWM - LHR

1 stop12h 30mKLM

Tue 27/112:40LHR - PWM

1 stop16h 40mKLM

Deal found 6/12£492

Tue 20/112:45PWM - LGW

2 stops17h 10mMultiple Airlines

Tue 27/111:55LGW - PWM

2 stops15h 20mMultiple Airlines

Deal found 6/12£726

Wed 21/114:35PWM - LHR

2 stops26h 05mScandinavian Airlines

Wed 28/106:40LHR - PWM

2 stops22h 40mScandinavian Airlines

Deal found 7/12£430

Wed 21/106:16PWM - LHR

2 stops22h 04mScandinavian Airlines

Sun 25/117:00LHR - PWM

2 stops36h 20mScandinavian Airlines

Deal found 6/12£460

Wed 21/106:16PWM - LHR

1 stop20h 49mKLM

Wed 28/112:40LHR - PWM

1 stop16h 40mKLM

Deal found 7/12£488

Wed 21/112:45PWM - LGW

2 stops17h 10mMultiple Airlines

Wed 28/111:55LGW - PWM

2 stops15h 20mMultiple Airlines

Deal found 7/12£723

Wed 21/106:00PWM - LHR

1 stop10h 20mUnited Airlines

Sun 25/116:00LHR - PWM

1 stop12h 30mUnited Airlines

Deal found 5/12£843

One-way flights from Portland to London
Search for one-way flight options from Portland to London. Find affordable one-way fares based on user searches. Data last updated 8 December 2025.

Fri 24/413:15PWM - LHR

1 stop13h 35mAmerican Airlines

Deal found 6/12£202

Fri 24/419:37PWM - LHR

2 stops44h 23mAir Canada

Deal found 6/12£313

Fri 9/111:29PWM - LHR

3 stops40h 01mMultiple Airlines

Deal found 7/12£319

Fri 9/111:29PWM - LGW

3 stops40h 41mMultiple Airlines

Deal found 7/12£320

Fri 9/111:29PWM - SEN

3 stops43h 46mMultiple Airlines

Deal found 7/12£325

Wed 7/111:02PWM - LHR

3 stops39h 43mMultiple Airlines

Deal found 7/12£331

Wed 7/111:02PWM - LGW

3 stops49h 48mMultiple Airlines

Deal found 7/12£344

Wed 7/111:02PWM - LCY

3 stops40h 43mMultiple Airlines

Deal found 7/12£350

Fri 24/414:35PWM - LCY

2 stops12h 20mDelta

Deal found 6/12£361

Tue 6/111:12PWM - LHR

1 stop18h 53mAustrian Airlines

Deal found 7/12£369

Tue 6/111:12PWM - LHR

2 stops40h 18mAir Canada

Deal found 7/12£371

Mon 5/112:20PWM - LHR

1 stop15h 25mKLM

Deal found 7/12£373

Find flight deals from Portland to London

Round-trip from	£430
One-way from	£202
Popular in	June
Cheapest in	October
Average price	£524

Scandinavian Airlines
21/1-28/1
4 total stops
48h 45m total
Portland to London

Search Deals

American Airlines
24/4
1 total stop
13h 35m total
Portland to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£101 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 21/1

14:35-21:40

2 stops26h 05m

London Heathrow

Wed 28/1

06:40-00:20

2 stops22h 40m

£430

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 20/1

14:35-17:40

2 stops22h 05m

London Heathrow

Tue 27/1

06:40-00:20

2 stops22h 40m

£451

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 21/1

05:30-07:50

1 stop21h 20m

London Heathrow

Wed 28/1

06:30-22:27

2 stops20h 57m

£472

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 20/1

05:30-07:50

1 stop21h 20m

London Heathrow

Tue 27/1

06:30-22:27

2 stops20h 57m

£472

PortlandLondon

PWM - LHR

PWMLHR

Portland

Wed 21/1

06:16-08:05

1 stop20h 49m

London Heathrow

Wed 28/1

12:40-00:20

1 stop16h 40m

£488

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 10/5

17:30-10:30

1 stop12h 00m

London Heathrow

Sat 16/5

09:15-22:27

1 stop18h 12m

£543

PortlandLondon

PWM - LGW

PWMLGW

Portland

Wed 21/1

12:45-10:55

2 stops17h 10m

London Gatwick

Wed 28/1

11:55-22:15

2 stops15h 20m

£723

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 20/1

12:45-10:55

2 stops17h 10m

London Gatwick

Tue 27/1

11:55-22:15

2 stops15h 20m

£726

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 10/4

06:00-08:55

2 stops21h 55m

London Gatwick

Sat 18/4

19:50-13:23

2 stops46h 33m

£1,033

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 10/4

14:30-11:40

2 stops16h 10m

London City

Sat 18/4

12:10-23:59

2 stops16h 49m

£3,874

Flights are sorted by cheapest return flights first.

Deals found on 6/12

Showing 1-10 of 38 results

Best time to book a flight from Portland to London

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

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

Currently, August is the cheapest month in which you can book a flight from Portland, Maine to London (average of £233). Flying from Portland, Maine to London in June is currently the most expensive (average of £421). 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.

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

Newark (EWR) – chosen by Cheapflights users on 40% of one-stop itineraries from Portland, Maine to London on Cheapflights.

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

New York (JFK) is the most affordable one-stop option, with an average return flight price of £482.

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

Flights via Newark (EWR) have the shortest average one-way travel time for one-stop routes: 9h 40m.

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

Flights via Newark (EWR) offer the fastest connection on this route, with an average stopover time of 1h 35m.

Related info for your journey

What airport do you fly from for flights from Portland to London?
Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London. You should not have trouble finding flights to London from Portland; the airport handles an average of 0 outbound flights to London per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Portland airport to London. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.
How long is the flight from Portland, Maine to London?
There are many flights that can get you from Portland, Maine to London in 26h 05m. Fly via Scandinavian Airlines to get the fastest option. The distance between Portland, Maine and London is about 3173 mi.
What are the most popular routes from Portland, Maine to London?
The most popular flight routes from Portland, Maine to London are Portland - London Heathrow, Portland - London Gatwick and Portland - London City.
Can I find deals for flights from Portland to London that include hotel bookings?
Yes. In addition to deals on Portland to London flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portland to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to London.
Can I find deals for business class flights from Portland to London?
Yes. Cheapflights offers flight deals from Portland to London 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 Portland, Maine to London?
Currently, August is the cheapest month in which you can book a flight from Portland, Maine to London (average of £233). Flying from Portland, Maine to London in June is currently the most expensive (average of £421). 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

Milton Keynes

Croydon

Hounslow

Slough

Gatwick

Luton

Ilford

Wembley

Colchester

Brentford

Watford

Hayes

Crawley

Deal

Winchester

Romford

Bedford

Chichester

Guildford

Ipswich

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

How does Cheapflights help users find flights from Portland to London?

Cheapflights helps you search for flights from Portland to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to London from Portland 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 Portland to London with no change fees?

Certainly. Search results for flights to London from Portland shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Yes, Cheapflights offers price alerts on Portland to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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.

Cheap flights from Portland, Maine to London from £202

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 24/4. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to London

Cheapest flights from Portland to LondonExplore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 December 2025.

Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 December 2025.

Find flight deals from Portland to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Best time to book a flight from Portland to London

Have a flexible travel schedule? Discover the best time to fly to London from Portland with our price prediction graph.

Cheapflights Insights

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

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

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

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

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

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

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

Shortest average travel time for one-stop one-way flights from Portland, Maine to London, 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 Portland, Maine to London?

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

Related info for your journey

Find useful and relevant information for your journey from Portland to London. 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 from for flights from Portland to London?

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

What are the most popular routes from Portland, Maine to London?

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

How can I find direct flights from Portland to London?

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

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

Travelling to a place near London?

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.

Alternative routes for Portland to London

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

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 Portland to London?

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

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

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Portland to London
Explore the most affordable flight options available from Portland to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 8 December 2025.