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 £461. Other airlines that can offer you cheap pricing are Delta, from £618, and Turkish Airlines, from £694. JetBlue is currently priced 29% below the average price you’ll pay for this route.

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

£398 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 Delta, with prices starting from £625 and £644, 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 Gatwick, Portland - London Heathrow 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 £525.

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.

£398+ Flights from Portland, Maine to London

Cheap flight deals from Portland to London

Round-trip from	£461
One-way from	£398
Popular in	June
Cheapest in	November
Average price	£568

JetBlue
29/4-4/5
2 total stops
22h 05m total
Portland to London

Search Deals

JetBlue
18/6
1 total stop
14h 10m total
Portland to London

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£115 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).

Search Deals

Average for round-trip flights in April 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 16 April 2025.

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Sun 4/508:15LHR - PWM

1 stop11h 10mJetBlue

Deal found 16/4£461

Tue 22/414:31PWM - LHR

1 stop11h 24mUnited Airlines

Tue 29/408:45LHR - PWM

2 stops19h 42mUnited Airlines

Deal found 15/4£522

Tue 22/405:20PWM - LHR

1 stop27h 10mDelta

Sun 27/409:00LHR - PWM

2 stops20h 42mDelta

Deal found 15/4£572

Tue 22/406:15PWM - LHR

2 stops22h 45mAir Canada

Mon 28/408:30LHR - PWM

2 stops19h 57mAir Canada

Deal found 15/4£653

Tue 29/406:35PWM - LGW

2 stops28h 40mTurkish Airlines

Sun 4/505:30LGW - PWM

2 stops22h 49mTurkish Airlines

Deal found 16/4£692

Tue 29/406:35PWM - LHR

2 stops29h 05mTurkish Airlines

Sun 4/506:30LHR - PWM

2 stops21h 49mTurkish Airlines

Deal found 16/4£734

Tue 29/406:15PWM - LHR

3 stops19h 15mMultiple Airlines

Sun 4/514:05LHR - PWM

2 stops14h 54mMultiple Airlines

Deal found 16/4£767

Sat 31/514:30PWM - LGW

1 stop14h 30mDelta

Sat 7/612:00LGW - PWM

1 stop17h 14mDelta

Deal found 16/4£841

Sun 22/606:30PWM - LHR

2 stops31h 20mScandinavian Airlines

Sun 29/619:30LHR - PWM

2 stops34h 16mScandinavian Airlines

Deal found 16/4£915

Sat 31/512:15PWM - LCY

2 stops20h 30mMultiple Airlines

Sat 7/609:20LCY - PWM

2 stops41h 36mMultiple Airlines

Deal found 16/4£1,110

Sat 31/516:57PWM - LGW

1 stop36h 13mMultiple Airlines

Sat 7/621:50LGW - PWM

2 stops21h 35mMultiple Airlines

Deal found 16/4£1,224

Sun 29/611:21PWM - LHR

1 stop14h 54mAustrian Airlines

Sat 5/719:30LHR - PWM

2 stops27h 56mAustrian Airlines

Deal found 16/4£1,300

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 16 April 2025.

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Sun 4/508:15LHR - PWM

1 stop11h 10mJetBlue

Deal found 16/4£461

Thu 15/514:30PWM - LCY

2 stops13h 20mDelta

Thu 22/509:20LCY - PWM

2 stops19h 54mDelta

Deal found 15/4£618

Fri 9/512:37PWM - LCY

3 stops18h 03mMultiple Airlines

Fri 30/508:55LCY - PWM

2 stops20h 02mMultiple Airlines

Deal found 15/4£672

Thu 15/515:35PWM - LGW

2 stops25h 45mTurkish Airlines

Thu 22/517:15LGW - PWM

2 stops58h 44mTurkish Airlines

Deal found 15/4£694

Tue 29/406:15PWM - LHR

3 stops19h 15mAir Canada

Sun 4/508:30LHR - PWM

3 stops19h 57mAir Canada

Deal found 16/4£773

Sun 22/606:30PWM - LHR

2 stops31h 20mScandinavian Airlines

Sun 29/619:30LHR - PWM

2 stops34h 16mScandinavian Airlines

Deal found 16/4£915

Sun 29/611:21PWM - LHR

1 stop14h 54mAustrian Airlines

Sat 5/719:30LHR - PWM

2 stops27h 56mAustrian Airlines

Deal found 16/4£1,300

Tue 29/406:35PWM - LHR

2 stops29h 05mTurkish Airlines

Sun 4/506:30LHR - PWM

2 stops21h 49mTurkish Airlines

Deal found 16/4£734

Tue 29/413:00PWM - LHR

1 stop14h 55mDelta

Sun 4/508:40LHR - PWM

2 stops19h 34mDelta

Deal found 16/4£752

Thu 15/521:29PWM - LGW

1 stop31h 31mMultiple Airlines

Thu 22/514:00LGW - PWM

1 stop26h 10mMultiple Airlines

Deal found 15/4£756

Tue 29/406:15PWM - LHR

3 stops19h 15mMultiple Airlines

Sun 4/514:05LHR - PWM

2 stops14h 54mMultiple Airlines

Deal found 16/4£767

Fri 30/514:30PWM - LGW

1 stop14h 30mDelta

Fri 6/612:00LGW - PWM

1 stop17h 14mDelta

Deal found 15/4£796

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

Sun 20/414:59PWM - LHR

2 stops21h 41mScandinavian Airlines

Sat 26/414:20LHR - PWM

2 stops39h 22mScandinavian Airlines

Deal found 15/4£1,475

Sun 20/406:15PWM - LHR

1 stop18h 40mAustrian Airlines

Sun 27/415:20LHR - PWM

1 stop13h 11mAustrian Airlines

Deal found 15/4£1,575

Mon 21/414:59PWM - LHR

2 stops20h 01mScandinavian Airlines

Sun 27/410:20LHR - PWM

2 stops19h 22mScandinavian Airlines

Deal found 15/4£2,819

Tue 22/414:31PWM - LHR

1 stop11h 24mUnited Airlines

Tue 29/408:45LHR - PWM

2 stops19h 42mUnited Airlines

Deal found 15/4£522

Tue 22/405:20PWM - LHR

1 stop27h 10mDelta

Sun 27/409:00LHR - PWM

2 stops20h 42mDelta

Deal found 15/4£572

Tue 22/406:15PWM - LHR

2 stops22h 45mAir Canada

Mon 28/408:30LHR - PWM

2 stops19h 57mAir Canada

Deal found 15/4£653

Tue 22/413:00PWM - LCY

2 stops15h 30mDelta

Tue 29/410:00LCY - PWM

2 stops19h 42mDelta

Deal found 15/4£988

Tue 22/406:35PWM - LGW

2 stops28h 40mTurkish Airlines

Tue 29/417:15LGW - PWM

2 stops33h 42mTurkish Airlines

Deal found 15/4£1,896

Wed 23/417:35PWM - LHR

1 stop10h 55mJetBlue

Mon 28/408:15LHR - PWM

1 stop13h 25mJetBlue

Deal found 15/4£539

Tue 29/417:35PWM - LHR

1 stop10h 55mJetBlue

Sun 4/508:15LHR - PWM

1 stop11h 10mJetBlue

Deal found 16/4£461

Tue 29/406:35PWM - LGW

2 stops28h 40mTurkish Airlines

Sun 4/505:30LGW - PWM

2 stops22h 49mTurkish Airlines

Deal found 16/4£692

Tue 29/406:35PWM - LHR

2 stops29h 05mTurkish Airlines

Sun 4/506:30LHR - PWM

2 stops21h 49mTurkish Airlines

Deal found 16/4£734

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 16 April 2025.

Wed 18/614:20PWM - LHR

1 stop14h 10mJetBlue

Deal found 16/4£398

Sat 31/514:15PWM - LHR

3 stops48h 45mMultiple Airlines

Deal found 16/4£553

Wed 18/606:10PWM - LHR

2 stops19h 20mAir Canada

Deal found 16/4£625

Wed 18/614:34PWM - LGW

1 stop14h 26mDelta

Deal found 16/4£644

Wed 18/614:34PWM - LCY

2 stops13h 56mDelta

Deal found 16/4£674

Wed 18/614:20PWM - LGW

3 stops40h 00mTAP AIR PORTUGAL

Deal found 16/4£973

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 29/4

17:35-09:30

1 stop10h 55m

London Heathrow

Sun 4/5

08:15-14:25

1 stop11h 10m

£461

PortlandLondon

PWM - LCY

PWMLCY

Portland

Thu 15/5

14:30-08:50

2 stops13h 20m

London City

Thu 22/5

09:20-00:14

2 stops19h 54m

£618

PortlandLondon

PWM - LCY

PWMLCY

Portland

Fri 9/5

12:37-11:40

3 stops18h 03m

London City

Fri 30/5

08:55-23:57

2 stops20h 02m

£672

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 15/5

15:35-22:20

2 stops25h 45m

London Gatwick

Thu 22/5

17:15-22:59

2 stops58h 44m

£694

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

06:35-16:40

2 stops29h 05m

London Heathrow

Sun 4/5

06:30-23:19

2 stops21h 49m

£734

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

13:00-08:55

1 stop14h 55m

London Heathrow

Sun 4/5

08:40-23:14

2 stops19h 34m

£752

PortlandLondon

PWM - LGW

PWMLGW

Portland

Thu 15/5

21:29-10:00

1 stop31h 31m

London Gatwick

Thu 22/5

14:00-11:10

1 stop26h 10m

£756

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

06:15-06:30

3 stops19h 15m

London Heathrow

Sun 4/5

14:05-23:59

2 stops14h 54m

£767

PortlandLondon

PWM - LHR

PWMLHR

Portland

Tue 29/4

06:15-06:30

3 stops19h 15m

London Heathrow

Sun 4/5

08:30-23:27

3 stops19h 57m

£773

PortlandLondon

PWM - LGW

PWMLGW

Portland

Fri 30/5

14:30-10:00

1 stop14h 30m

London Gatwick

Fri 6/6

12:00-00:14

1 stop17h 14m

£796

Flights are sorted by cheapest return flights first.

Deals found on 16/4

Showing 1-10 of 19 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

7,916 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

7,916 reviews

Delta

8.0

Very Good

7,916 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

7.6

Good

775 reviews

Delta

8.0

Very Good

7,916 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

8,665 reviews

Delta

8.0

Very Good

7,916 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

2,926 reviews

Delta

8.0

Very Good

7,916 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.

Turkish Airlines

7.3

Good

3,767 reviews

Delta

8.0

Very Good

7,916 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 £461. Other airlines that can offer you cheap pricing are Delta, from £618, and Turkish Airlines, from £694. JetBlue is currently priced 29% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from Portland, Maine to London one-way?
£398 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 Delta, with prices starting from £625 and £644, 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 Gatwick, Portland - London Heathrow 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.

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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 £398

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 18/6. 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 16 April 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 16 April 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 16 April 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 16 April 2025.