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

Cheapflights users have booked flights from Portland, Maine to London round-trip from £482. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from £519, and Delta, from £521. JetBlue is currently priced 22% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from Portland, Maine to London one-way?

£235 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Air Canada and KLM, with prices starting from £292 and £339, respectively.

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 month to fly from Portland, Maine to London?

Flights from Portland, Maine to London lean towards being more expensive in June. Prices are generally better when you fly from Portland, Maine to London in October, with the cheapest ticket starting at £442.

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

A simple way to save on the total cost of your ticket is to fly from Portland, Maine to London at midday. If you’re flexible enough to do this you can expect to save up to 6% on your trip compared to booking a flight in the morning.

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.

£214+ Flights from Portland, Maine to London

Cheap flight deals from Portland to London

Round-trip from	£482
One-way from	£214
Popular in	June
Cheapest in	October
Average price	£890

JetBlue
5/8-26/8
2 total stops
26h 17m total
Portland to London

Search Deals

30/7
1 total stop
16h 22m total
Portland to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£106 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Portland to London

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 15 June 2025.

Tue 5/806:10PWM - LHR

1 stop9h 35mJetBlue

Tue 26/811:55LHR - PWM

1 stop16h 42mJetBlue

Deal found 14/6£482

Fri 5/906:31PWM - LHR

2 stops45h 49mScandinavian Airlines

Mon 15/907:05LHR - PWM

2 stops21h 26mScandinavian Airlines

Deal found 12/6£519

Tue 12/814:36PWM - LGW

1 stop14h 24mDelta

Wed 20/812:00LGW - PWM

1 stop17h 48mDelta

Deal found 13/6£521

Tue 5/806:01PWM - LHR

1 stop9h 39mUnited Airlines

Tue 26/814:05LHR - PWM

2 stops29h 20mUnited Airlines

Deal found 14/6£537

Tue 12/812:53PWM - LHR

1 stop15h 02mDelta

Wed 20/809:00LHR - PWM

2 stops20h 48mDelta

Deal found 13/6£547

Tue 4/1112:30PWM - LHR

1 stop12h 55mMultiple Airlines

Wed 12/1114:20LHR - PWM

1 stop14h 44mMultiple Airlines

Deal found 14/6£554

Thu 7/807:28PWM - LHR

2 stops32h 32mAir Canada

Fri 22/809:30LHR - PWM

2 stops18h 31mAir Canada

Deal found 13/6£569

Fri 10/1009:46PWM - LGW

1 stop19h 14mMultiple Airlines

Tue 14/1014:00LGW - PWM

1 stop25h 36mMultiple Airlines

Deal found 12/6£605

Thu 9/1016:55PWM - LHR

1 stop11h 00mKLM

Mon 13/1010:55LHR - PWM

1 stop17h 36mKLM

Deal found 12/6£626

Fri 10/1014:35PWM - LCY

2 stops13h 55mDelta

Tue 14/1009:20LCY - PWM

2 stops19h 11mDelta

Deal found 12/6£644

Tue 5/814:08PWM - LCY

2 stops17h 22mMultiple Airlines

Tue 26/819:20LCY - PWM

2 stops28h 06mMultiple Airlines

Deal found 14/6£720

Thu 9/1014:17PWM - LGW

2 stops20h 58mTurkish Airlines

Mon 13/1017:15LGW - PWM

2 stops25h 07mTurkish Airlines

Deal found 12/6£753

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 15 June 2025.

Tue 5/806:10PWM - LHR

1 stop9h 35mJetBlue

Tue 26/811:55LHR - PWM

1 stop16h 42mJetBlue

Deal found 14/6£482

Fri 5/906:31PWM - LHR

2 stops45h 49mScandinavian Airlines

Mon 15/907:05LHR - PWM

2 stops21h 26mScandinavian Airlines

Deal found 12/6£519

Tue 12/814:36PWM - LGW

1 stop14h 24mDelta

Wed 20/812:00LGW - PWM

1 stop17h 48mDelta

Deal found 13/6£521

Tue 5/806:01PWM - LHR

1 stop9h 39mUnited Airlines

Tue 26/814:05LHR - PWM

2 stops29h 20mUnited Airlines

Deal found 14/6£537

Tue 4/1112:30PWM - LHR

1 stop12h 55mMultiple Airlines

Wed 12/1114:20LHR - PWM

1 stop14h 44mMultiple Airlines

Deal found 14/6£554

Thu 7/807:28PWM - LHR

2 stops32h 32mAir Canada

Fri 22/809:30LHR - PWM

2 stops18h 31mAir Canada

Deal found 13/6£569

Thu 9/1016:55PWM - LHR

1 stop11h 00mKLM

Mon 13/1010:55LHR - PWM

1 stop17h 36mKLM

Deal found 12/6£626

Thu 9/1014:17PWM - LGW

2 stops20h 58mTurkish Airlines

Mon 13/1017:15LGW - PWM

2 stops25h 07mTurkish Airlines

Deal found 12/6£753

Tue 29/714:19PWM - LGW

2 stops20h 16mTAP AIR PORTUGAL

Tue 5/810:35LGW - PWM

2 stops18h 42mTAP AIR PORTUGAL

Deal found 13/6£803

Tue 12/812:53PWM - LHR

1 stop15h 02mDelta

Wed 20/809:00LHR - PWM

2 stops20h 48mDelta

Deal found 13/6£547

Fri 10/1009:46PWM - LGW

1 stop19h 14mMultiple Airlines

Tue 14/1014:00LGW - PWM

1 stop25h 36mMultiple Airlines

Deal found 12/6£605

Fri 10/1014:35PWM - LCY

2 stops13h 55mDelta

Tue 14/1009:20LCY - PWM

2 stops19h 11mDelta

Deal found 12/6£644

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated 15 June 2025 and is based on user searches.

Sun 22/606:10PWM - LHR

1 stop9h 35mJetBlue

Sun 29/611:55LHR - PWM

1 stop16h 57mJetBlue

Deal found 13/6£881

Sun 22/614:34PWM - LGW

1 stop14h 26mDelta

Sun 29/612:00LGW - PWM

1 stop17h 46mDelta

Deal found 13/6£1,229

Sun 22/614:34PWM - LHR

1 stop13h 16mDelta

Sun 29/620:10LHR - PWM

2 stops20h 54mDelta

Deal found 13/6£1,263

Sun 22/606:20PWM - LHR

3 stops19h 10mAir Canada

Sun 29/608:30LHR - PWM

3 stops20h 14mAir Canada

Deal found 13/6£1,380

Sun 22/606:20PWM - LHR

3 stops19h 10mMultiple Airlines

Sun 29/614:05LHR - PWM

2 stops14h 39mMultiple Airlines

Deal found 15/6£1,522

Sun 22/614:19PWM - LGW

2 stops19h 51mTAP AIR PORTUGAL

Sun 29/610:35LGW - PWM

2 stops18h 17mTAP AIR PORTUGAL

Deal found 14/6£1,939

Sun 22/606:10PWM - LGW

2 stops22h 25mTurkish Airlines

Sun 29/605:30LGW - PWM

2 stops23h 22mTurkish Airlines

Deal found 13/6£2,450

Tue 1/710:51PWM - LGW

3 stops20h 24mMultiple Airlines

Sun 6/714:00LGW - PWM

1 stop32h 25mMultiple Airlines

Deal found 13/6£1,036

Sat 5/707:28PWM - LHR

2 stops42h 02mAir Canada

Mon 21/715:50LHR - PWM

2 stops46h 34mAir Canada

Deal found 13/6£667

Sun 6/714:19PWM - LHR

1 stop14h 11mJetBlue

Sun 13/711:55LHR - PWM

1 stop17h 22mJetBlue

Deal found 13/6£709

Mon 28/718:54PWM - LHR

1 stop13h 36mKLM

Mon 4/815:15LHR - PWM

1 stop14h 23mKLM

Deal found 12/6£627

Tue 29/714:34PWM - LGW

1 stop14h 26mDelta

Tue 5/812:00LGW - PWM

1 stop17h 57mDelta

Deal found 13/6£552

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 15 June 2025.

Wed 30/712:38PWM - LGW

1 stop16h 22mMultiple Airlines

Deal found 13/6£214

Tue 22/714:19PWM - LHR

1 stop14h 11mJetBlue

Deal found 14/6£235

Tue 22/713:50PWM - LHR

2 stops17h 05mMultiple Airlines

Deal found 14/6£260

Fri 10/1017:36PWM - LHR

2 stops46h 24mAir Canada

Deal found 14/6£292

Fri 10/1014:35PWM - LHR

1 stop14h 40mKLM

Deal found 14/6£339

Sat 2/813:12PWM - LGW

2 stops15h 48mDelta

Deal found 14/6£382

Fri 10/1014:35PWM - LCY

2 stops16h 05mDelta

Deal found 14/6£388

Tue 22/713:50PWM - SEN

3 stops24h 50mMultiple Airlines

Deal found 14/6£401

Tue 22/713:50PWM - LCY

3 stops26h 50mMultiple Airlines

Deal found 14/6£411

Wed 2/714:19PWM - LHR

1 stop14h 11mTAP AIR PORTUGAL

Deal found 13/6£532

Tue 15/706:05PWM - LGW

2 stops25h 55mTurkish Airlines

Deal found 14/6£648

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 5/8

06:10-20:45

1 stop9h 35m

London Heathrow

Tue 26/8

11:55-23:37

1 stop16h 42m

£482

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 5/9

06:31-09:20

2 stops45h 49m

London Heathrow

Mon 15/9

07:05-23:31

2 stops21h 26m

£519

PortlandLondon

PWM - LGW

PWMLGW

Portland

Tue 12/8

14:36-10:00

1 stop14h 24m

London Gatwick

Wed 20/8

12:00-00:48

1 stop17h 48m

£521

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 5/8

06:01-20:40

1 stop9h 39m

London Heathrow

Tue 26/8

14:05-14:25

2 stops29h 20m

£537

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 12/8

12:53-08:55

1 stop15h 02m

London Heathrow

Wed 20/8

09:00-00:48

2 stops20h 48m

£547

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 4/11

12:30-06:25

1 stop12h 55m

London Heathrow

Wed 12/11

14:20-00:04

1 stop14h 44m

£554

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 7/8

07:28-21:00

2 stops32h 32m

London Heathrow

Fri 22/8

09:30-23:01

2 stops18h 31m

£569

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 10/10

09:46-10:00

1 stop19h 14m

London Gatwick

Tue 14/10

14:00-10:36

1 stop25h 36m

£605

PortlandLondon

PWM - LHR

PWMLHR

Portland

Thu 9/10

16:55-08:55

1 stop11h 00m

London Heathrow

Mon 13/10

10:55-23:31

1 stop17h 36m

£626

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 10/10

14:35-09:30

2 stops13h 55m

London City

Tue 14/10

09:20-23:31

2 stops19h 11m

£644

Flights are sorted by cheapest return flights first.

Deals found on 13/6

Showing 1-10 of 26 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, January is the cheapest month in which you can book a flight from Portland, Maine to London (average of £112). Flying from Portland, Maine to London in August is currently the most expensive (average of £164). 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.

Rainfall in London by month

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.

Temperature in London by month

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).

Reviews of airlines servicing London

Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from Portland to London by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very Good

7,961 reviews

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

KLM

7.8

Good

1,361 reviews

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Austrian Airlines

7.6

Good

803 reviews

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,798 reviews

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

JetBlue

7.3

Good

2,923 reviews

Delta

8.0

Very Good

7,961 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.
What are the cheapest airlines flying from Portland, Maine to London round-trip?
Cheapflights users have booked flights from Portland, Maine to London round-trip from £482. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from £519, and Delta, from £521. JetBlue is currently priced 22% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland, Maine to London one-way?
£235 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Air Canada and KLM, with prices starting from £292 and £339, respectively.
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, January is the cheapest month in which you can book a flight from Portland, Maine to London (average of £112). Flying from Portland, Maine to London in August is currently the most expensive (average of £164). 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

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Ilford

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Winchester

Folkestone

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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.

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Cheap flights from Portland, Maine to London from £214

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 30/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portland to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 15 June 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 15 June 2025.

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?

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 15 June 2025.

Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from Portland to London by reading reviews from past customers. In addition to providing an overall rating, 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 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?

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

What are the cheapest airlines to fly from Portland, Maine to London one-way?

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 Portland?

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?

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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 15 June 2025.