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 £493. Other airlines that can offer you cheap pricing are United Airlines, from £664, and Delta, from £667. JetBlue is currently priced 27% below the average price you’ll pay for this route.

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

£339 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on TAP AIR PORTUGAL and Delta, with prices starting from £431 and £455, 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 November, with the cheapest ticket starting at £538.

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.

£339+ Flights from Portland, Maine to London

Cheap flight deals from Portland to London

Round-trip from	£493
One-way from	£339
Popular in	June
Cheapest in	November
Average price	£580

JetBlue
12/5-19/5
2 total stops
24h 20m total
Portland to London

Search Deals

JetBlue
16/8
1 total stop
9h 35m total
Portland to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£111 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 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 29 March 2025.

Wed 1/1014:15PWM - LHR

1 stop14h 15mJetBlue

Tue 7/1011:55LHR - PWM

1 stop15h 04mJetBlue

Deal found 27/3£470

Wed 1/1014:35PWM - LHR

2 stops37h 45mScandinavian Airlines

Tue 7/1019:30LHR - PWM

2 stops33h 15mScandinavian Airlines

Deal found 27/3£540

Wed 1/1006:00PWM - LHR

1 stop19h 20mUnited Airlines

Tue 7/1014:05LHR - PWM

2 stops32h 25mUnited Airlines

Deal found 27/3£586

Wed 8/1006:00PWM - LHR

2 stops19h 30mAir Canada

Sun 12/1009:30LHR - PWM

2 stops18h 47mAir Canada

Deal found 28/3£636

Wed 8/1012:47PWM - LHR

1 stop17h 38mMultiple Airlines

Sun 12/1009:30LHR - PWM

2 stops15h 58mMultiple Airlines

Deal found 28/3£643

Sun 27/407:00PWM - LCY

2 stops19h 15mDelta

Sun 4/513:45LCY - PWM

2 stops15h 57mDelta

Deal found 28/3£667

Fri 9/507:12PWM - LGW

2 stops21h 43mTurkish Airlines

Tue 20/505:30LGW - PWM

2 stops22h 30mTurkish Airlines

Deal found 29/3£706

Sat 29/305:29PWM - LHR

1 stop10h 41mDelta

Fri 4/409:55LHR - PWM

2 stops19h 04mDelta

Deal found 27/3£767

Fri 9/511:50PWM - LCY

2 stops18h 50mMultiple Airlines

Tue 20/519:20LCY - PWM

2 stops28h 51mMultiple Airlines

Deal found 29/3£811

Fri 26/1213:14PWM - LHR

1 stop12h 21mAmerican Airlines

Wed 31/1213:10LHR - PWM

1 stop14h 19mAmerican Airlines

Deal found 28/3£894

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/719:05LHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 28/3£940

Wed 8/1014:15PWM - LGW

1 stop12h 55mMultiple Airlines

Sun 12/1014:45LGW - PWM

1 stop12h 14mMultiple Airlines

Deal found 28/3£989

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 29 March 2025.

Mon 12/515:35PWM - LHR

1 stop12h 55mJetBlue

Mon 19/508:15LHR - PWM

1 stop11h 25mJetBlue

Deal found 28/3£493

Mon 12/515:43PWM - LHR

1 stop12h 37mUnited Airlines

Mon 19/513:45LHR - PWM

2 stops14h 42mUnited Airlines

Deal found 28/3£664

Sun 27/407:00PWM - LCY

2 stops19h 15mDelta

Sun 4/513:45LCY - PWM

2 stops15h 57mDelta

Deal found 28/3£667

Sun 22/606:30PWM - LHR

2 stops22h 05mScandinavian Airlines

Sun 29/615:35LHR - PWM

2 stops38h 11mScandinavian Airlines

Deal found 28/3£881

Fri 27/614:20PWM - LGW

2 stops20h 55mTurkish Airlines

Sun 13/714:00LGW - PWM

2 stops28h 23mTurkish Airlines

Deal found 28/3£897

Sun 8/606:10PWM - LHR

1 stop20h 05mAustrian Airlines

Sat 14/619:30LHR - PWM

2 stops32h 58mAustrian Airlines

Deal found 28/3£1,013

Fri 27/608:00PWM - LHR

3 stops17h 30mAir Canada

Sun 13/708:30LHR - PWM

3 stops20h 14mAir Canada

Deal found 28/3£1,139

Sun 8/606:10PWM - LHR

3 stops19h 20mMultiple Airlines

Sat 14/612:40LHR - PWM

2 stops15h 51mMultiple Airlines

Deal found 28/3£1,455

Fri 27/614:20PWM - LHR

2 stops27h 05mTurkish Airlines

Sun 13/719:05LHR - PWM

2 stops33h 32mTurkish Airlines

Deal found 28/3£940

Sun 22/614:34PWM - LHR

1 stop13h 41mDelta

Sun 29/611:30LHR - PWM

2 stops18h 16mDelta

Deal found 28/3£1,069

Sun 22/614:34PWM - LGW

1 stop14h 26mDelta

Sun 29/612:00LGW - PWM

1 stop17h 46mDelta

Deal found 29/3£1,082

Sun 27/406:15PWM - LCY

2 stops25h 30mMultiple Airlines

Sun 4/515:25LCY - PWM

3 stops37h 02mMultiple Airlines

Deal found 28/3£4,860

Last-minute flights from Portland to London
Discover last-minute flight deals from Portland to London. Data last updated 29 March 2025 and is based on user searches.

Sat 29/315:55PWM - LHR

2 stops33h 35mAir Canada

Sun 6/414:05LHR - PWM

2 stops28h 31mAir Canada

Deal found 27/3£760

Sat 29/305:29PWM - LHR

1 stop10h 41mDelta

Fri 4/409:55LHR - PWM

2 stops19h 04mDelta

Deal found 27/3£767

Sat 29/315:00PWM - LHR

1 stop14h 15mKLM

Sun 6/415:15LHR - PWM

1 stop14h 08mKLM

Deal found 27/3£816

Sat 29/315:55PWM - LHR

2 stops13h 45mUnited Airlines

Sat 5/412:40LHR - PWM

2 stops15h 47mUnited Airlines

Deal found 27/3£820

Sat 29/310:08PWM - LGW

1 stop19h 42mMultiple Airlines

Fri 4/420:50LGW - PWM

2 stops32h 33mMultiple Airlines

Deal found 27/3£1,163

Sun 30/317:35PWM - LHR

1 stop10h 55mJetBlue

Fri 4/411:55LHR - PWM

1 stop16h 45mJetBlue

Deal found 27/3£551

Sun 30/306:00PWM - LHR

2 stops23h 00mMultiple Airlines

Sat 5/419:30LHR - PWM

2 stops32h 57mMultiple Airlines

Deal found 27/3£766

Sun 30/312:30PWM - LCY

2 stops19h 00mMultiple Airlines

Sat 5/409:20LCY - PWM

2 stops41h 15mMultiple Airlines

Deal found 27/3£1,028

Sun 30/317:35PWM - LGW

2 stops23h 50mTurkish Airlines

Sat 5/417:40LGW - PWM

2 stops28h 00mTurkish Airlines

Deal found 27/3£1,599

Tue 1/416:11PWM - LHR

2 stops13h 09mAmerican Airlines

Thu 3/410:05LHR - PWM

1 stop17h 52mAmerican Airlines

Deal found 28/3£1,731

Tue 1/415:00PWM - LHR

3 stops25h 20mScandinavian Airlines

Thu 3/407:05LHR - PWM

3 stops22h 18mScandinavian Airlines

Deal found 28/3£1,793

Sun 27/407:00PWM - LCY

2 stops19h 15mDelta

Sun 4/513:45LCY - PWM

2 stops15h 57mDelta

Deal found 28/3£667

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 29 March 2025.

Sat 16/806:10PWM - LHR

1 stop9h 35mJetBlue

Deal found 28/3£339

Sat 16/818:18PWM - LHR

2 stops36h 37mMultiple Airlines

Deal found 28/3£384

Sat 16/814:20PWM - LGW

2 stops38h 25mTAP AIR PORTUGAL

Deal found 28/3£431

Sat 16/814:35PWM - LGW

1 stop14h 25mDelta

Deal found 28/3£455

Sat 16/808:00PWM - LHR

3 stops17h 30mAir Canada

Deal found 28/3£460

Sat 16/815:04PWM - LCY

2 stops17h 41mUnited Airlines

Deal found 28/3£481

Wed 18/617:00PWM - LHR

2 stops38h 05mWestJet

Deal found 28/3£555

Wed 18/614:20PWM - LGW

2 stops16h 25mMultiple Airlines

Deal found 28/3£595

Wed 18/606:00PWM - LCY

2 stops20h 15mVirgin Atlantic

Deal found 28/3£674

Wed 18/612:51PWM - LCY

2 stops14h 19mDelta

Deal found 29/3£688

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

Mon 12/5

15:35-09:30

1 stop12h 55m

London Heathrow

Mon 19/5

08:15-14:40

1 stop11h 25m

£493

PortlandLondon

PWM - LHR

PWMLHR

Portland

Mon 12/5

15:43-09:20

1 stop12h 37m

London Heathrow

Mon 19/5

13:45-23:27

2 stops14h 42m

£664

PortlandLondon

PWM - LCY

PWMLCY

Portland

Sun 27/4

07:00-07:15

2 stops19h 15m

London City

Sun 4/5

13:45-00:42

2 stops15h 57m

£667

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 22/6

06:30-09:35

2 stops22h 05m

London Heathrow

Sun 29/6

15:35-00:46

2 stops38h 11m

£881

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 27/6

14:20-16:15

2 stops20h 55m

London Gatwick

Sun 13/7

14:00-13:23

2 stops28h 23m

£897

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/6

14:20-22:25

2 stops27h 05m

London Heathrow

Sun 13/7

19:05-23:37

2 stops33h 32m

£940

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 8/6

06:10-07:15

1 stop20h 05m

London Heathrow

Sat 14/6

19:30-23:28

2 stops32h 58m

£1,013

PortlandLondon

PWM - LHR

PWMLHR

Portland

Sun 22/6

14:34-09:15

1 stop13h 41m

London Heathrow

Sun 29/6

11:30-00:46

2 stops18h 16m

£1,069

PortlandLondon

PWM - LGW

PWMLGW

Portland

Sun 22/6

14:34-10:00

1 stop14h 26m

London Gatwick

Sun 29/6

12:00-00:46

1 stop17h 46m

£1,082

PortlandLondon

PWM - LHR

PWMLHR

Portland

Fri 27/6

08:00-06:30

3 stops17h 30m

London Heathrow

Sun 13/7

08:30-23:44

3 stops20h 14m

£1,139

Flights are sorted by cheapest return flights first.

Deals found on 28/3

Showing 1-10 of 22 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, Austrian Airlines and United 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

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very Good

7,895 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines

7.5

Good

769 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,609 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.4

Good

634 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

JetBlue

7.3

Good

2,922 reviews

Delta

8.0

Very Good

7,895 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 £493. Other airlines that can offer you cheap pricing are United Airlines, from £664, and Delta, from £667. JetBlue is currently priced 27% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland, Maine to London one-way?
£339 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on TAP AIR PORTUGAL and Delta, with prices starting from £431 and £455, 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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Ipswich

Watford

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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 £339

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 16/8. 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 29 March 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 29 March 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 29 March 2025.

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 29 March 2025.