HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Portland (PWM) to Heathrow (LHR) from $571

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 7/1. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
PWM — LHR
Jun 11 — Jun 181
From?
To?
Tue 6/11
Tue 6/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Cheap flight deals from Portland to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 6, 2024.

Popular in

June

Cheapest in

December

Average price

$1,411

Round-trip from

$643
High demand for flights, 32% potential price rise
Search Deals
Best time to find cheap flights, 24% potential price drop
Search Deals
Average for round-trip flights in June 2024
Search Deals
From Portland to London Heathrow
Search Deals

What is the cheapest day to fly round-trip from Portland, Maine to London Heathrow Airport?

It’s generally more expensive to depart on a Wednesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

What is the cheapest month to fly from Portland, Maine to London Heathrow Airport?

March can be a great time to fly to London Heathrow Airport from Portland, Maine with a flight ticket averaging about $1,101. Cheapflights users have found deals in the month of March for as cheap as $586. The most expensive prices can be found in the month of June.

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

It’s typically best to fly out from Portland, Maine to London Heathrow Airport at noon. Doing so could potentially save you 23% on the flight price compared to flying in the afternoon, which is usually more expensive.

Cheap Portland to Heathrow flights in June & July 2024

Find cheap flight options from Portland to Heathrow specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Prices were last updated on June 6, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. Check back regularly for other flight deals.
Wed 7/172:09 pmPWM - LHR
1 stop12h 56mKLM
Thu 7/2510:50 amLHR - PWM
1 stop18h 20mKLM
Deal found 6/6$891
Wed 7/171:28 pmPWM - LHR
1 stop18h 47mVirgin Atlantic
Thu 7/2510:50 amLHR - PWM
2 stops17h 36mVirgin Atlantic
Deal found 6/6$896
Wed 7/37:22 pmPWM - LHR
1 stop30h 23mUnited Airlines
Wed 7/108:00 amLHR - PWM
1 stop10h 51mUnited Airlines
Deal found 6/5$954
Wed 7/33:50 pmPWM - LHR
2 stops20h 15mUnited Airlines
Wed 7/108:00 amLHR - PWM
1 stop10h 51mUnited Airlines
Deal found 6/5$982
Sat 7/62:08 pmPWM - LHR
1 stop16h 02mDelta
Sat 7/131:55 pmLHR - PWM
1 stop15h 15mDelta
Deal found 6/6$991
Thu 7/186:00 amPWM - LHR
1 stop20h 45mAmerican Airlines
Sun 7/219:35 amLHR - PWM
2 stops18h 05mAmerican Airlines
Deal found 6/6$996
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/1811:30 amLHR - PWM
2 stops17h 54mDelta
Deal found 6/5$1,017
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/184:20 pmLHR - PWM
1 stop13h 04mDelta
Deal found 6/5$1,024
Sat 6/226:00 amPWM - LHR
1 stop18h 55mUnited Airlines
Sat 6/291:00 pmLHR - PWM
1 stop12h 55mUnited Airlines
Deal found 6/5$1,029

Portland to Heathrow 2024 flight deals

Discover exclusive flight deals for travel between Portland and Heathrow in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. Check back regularly for other flight deals.
Tue 10/81:06 pmPWM - LHR
1 stop15h 24mJetBlue
Tue 10/2211:55 amLHR - PWM
1 stop14h 34mJetBlue
Deal found 6/6$612
Tue 9/2412:47 pmPWM - LHR
1 stop13h 58mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops16h 25mAmerican Airlines
Deal found 6/5$617
Tue 9/244:17 pmPWM - LHR
2 stops13h 03mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops16h 25mAmerican Airlines
Deal found 6/5$620
Tue 11/53:15 pmPWM - LHR
1 stop10h 40mUnited Airlines
Tue 11/126:00 pmLHR - PWM
2 stops25h 18mUnited Airlines
Deal found 6/6$632
Tue 11/56:00 amPWM - LHR
2 stops24h 50mAir Canada
Tue 11/126:00 pmLHR - PWM
2 stops34h 11mAir Canada
Deal found 6/6$638
Tue 10/86:00 amPWM - LHR
1 stop9h 40mUnited Airlines
Tue 10/226:50 amLHR - PWM
2 stops17h 56mUnited Airlines
Deal found 6/6$640
Tue 9/242:52 pmPWM - LHR
1 stop12h 13mKLM
Tue 10/110:50 amLHR - PWM
1 stop18h 18mKLM
Deal found 6/5$648
Tue 10/85:29 pmPWM - LHR
2 stops12h 46mAmerican Airlines
Tue 10/221:40 pmLHR - PWM
2 stops14h 58mAmerican Airlines
Deal found 6/6$653
Tue 9/107:25 pmPWM - LHR
1 stop10h 15mUnited Airlines
Fri 9/204:00 pmLHR - PWM
2 stops27h 43mUnited Airlines
Deal found 6/5$667

Portland to Heathrow flights leaving soon

Find last-minute flight options from Portland to Heathrow for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Book one of these great deals on flights from Portland to London. To prevent any unwanted surprises, users should verify their flight info before booking.
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/1811:30 amLHR - PWM
2 stops17h 54mDelta
Deal found 6/5$1,017
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/184:20 pmLHR - PWM
1 stop13h 04mDelta
Deal found 6/5$1,024
Mon 6/1012:29 pmPWM - LHR
1 stop14h 21mAmerican Airlines
Sun 6/169:45 amLHR - PWM
1 stop17h 50mAmerican Airlines
Deal found 6/5$1,215
Mon 6/103:50 pmPWM - LHR
1 stop11h 30mUnited Airlines
Sun 6/166:50 amLHR - PWM
2 stops22h 08mUnited Airlines
Deal found 6/5$1,216
Mon 6/101:09 pmPWM - LHR
2 stops13h 56mAmerican Airlines
Sun 6/1612:30 pmLHR - PWM
2 stops16h 23mAmerican Airlines
Deal found 6/5$1,220
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/1811:30 amLHR - PWM
2 stops17h 54mDelta
Deal found 6/5$1,228
Sat 6/155:05 amPWM - LHR
1 stop10h 05mDelta
Tue 6/1810:50 amLHR - PWM
1 stop18h 34mDelta
Deal found 6/5$1,235
Sat 6/1512:50 pmPWM - LHR
3 stops21h 05mMultiple Airlines
Tue 6/186:45 amLHR - PWM
3 stops21h 15mMultiple Airlines
Deal found 6/5$1,399
Sat 6/159:45 amPWM - LHR
2 stops24h 50mMultiple Airlines
Tue 6/1811:20 amLHR - PWM
2 stops26h 29mMultiple Airlines
Deal found 6/5$1,498

One-way flights to Heathrow from Portland

Search for one-way flight options from Portland to Heathrow. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
Take a look at some of the best available options we've come across on one-way flights from Portland to London. Users can also find round-trip Portland to London flights by using the search form above.
Mon 7/110:41 amPWM - LHR
3 stops29h 54mMultiple Airlines
Deal found 6/5$571
Mon 7/12:32 pmPWM - LHR
2 stops14h 38mUnited Airlines
Deal found 6/5$577
Sat 6/1511:57 amPWM - LHR
3 stops41h 23mMultiple Airlines
Deal found 6/6$666
Sat 6/156:10 amPWM - LHR
2 stops33h 50mAir Canada
Deal found 6/6$782
Sat 6/157:15 pmPWM - LHR
1 stop30h 30mUnited Airlines
Deal found 6/5$800
Sat 6/157:17 amPWM - LHR
1 stop33h 53mAmerican Airlines
Deal found 6/6$801

Find flights from Portland to Heathrow within your budget

Customize your flight search to find flights from Portland to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$617 - $1,205

Route

Depart

Return

Price

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop13h 58m

London Heathrow

Tue 10/1

2 stops16h 25m

$617

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

2 stops13h 03m

London Heathrow

Tue 10/1

2 stops16h 25m

$620

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop12h 13m

London Heathrow

Tue 10/1

1 stop18h 18m

$648

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/10

1 stop10h 15m

London Heathrow

Fri 9/20

2 stops27h 43m

$667

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Sat 10/26

1 stop21h 23m

London Heathrow

Sun 11/3

2 stops27h 49m

$681

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 9/25

1 stop12h 13m

London Heathrow

Sun 9/29

2 stops20h 08m

$691

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Sat 10/5

1 stop12h 31m

London Heathrow

Sat 10/12

1 stop13h 38m

$748

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Sat 10/26

3 stops19h 28m

London Heathrow

Sun 11/3

3 stops21h 48m

$759

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Thu 8/15

2 stops26h 50m

London Heathrow

Thu 8/22

2 stops32h 20m

$1,205

Flights are sorted by cheapest first

Deals found on 6/5

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

Use this chart to determine the cheapest time to fly round-trip from Portland to Heathrow. Price data was last updated on June 2, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Portland, Maine to London Heathrow Airport flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland with our price prediction graph.
Estimated round-trip 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.

Temperature and rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature and rainfall totals by month.

LON

Temperature

39.2 - 62.6 °F

If weather is an important factor for your trip to London Heathrow Airport, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated June 6, 2024.
Read reviews from past customers who have flown American Airlines, KLM and Delta from Portland to London. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,368 reviews
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

KLM
7.9
Good
1,489 reviews
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Austrian Airlines
7.7
Good
1,010 reviews
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.5
Good
1,720 reviews
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
10,696 reviews
Delta
8.0
Very good
10,368 reviews

Entertainment

8.0

Food

7.4

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

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

    Portland (PWM) is the airport you will fly out of if you book a flight from Portland to London Heathrow. You should not have trouble finding flights to London Heathrow from Portland; the airport handles an average of 0 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Portland airport to London Heathrow. It is only a 2.9 mi journey to Portland (PWM) from Portland’s city center.

  • Can I find flights from Portland, Maine to London Heathrow Airport for under $700 on Cheapflights?

    Yes, there are multiple flights from Portland, Maine to London Heathrow Airport for under $700. The cheapest flight booked recently is on American Airlines for just $617, but on average you can expect to pay $706.

  • Are there last-minute flights available from Portland, Maine to London Heathrow Airport for under $1,100?

    There are currently 14+ open flights from Portland, Maine to London Heathrow Airport within the next 7 days for less than $1,100.

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

    American Airlines, at $617, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include KLM and United Airlines. These flights start at 35% lower than the current average price 3 months from now.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $577. However, be on the lookout for offers from Air Canada and American Airlines, as they are both options that can get you from Portland, Maine to London Heathrow Airport for a low price.

  • What does PWM to LHR mean?

    Great question - PWM to LHR just means Portland Airport to London Heathrow Airport. Now you’ll know what these unique codes when you look for flights!

  • Can I find deals for flights from Portland to Heathrow that include extra baggage allowance?

    The amount of baggage you can bring on your Portland to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Portland to Heathrow with specific airlines?

    Yes, Cheapflights allows you to browse and filter Portland to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

  • How can I find direct flights from Portland to Heathrow?

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

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

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

  • Can I find deals for flights from Portland to Heathrow that allow pets onboard?

    Many airlines flying from Portland to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Portland to Heathrow?

    Yes, you can often find last-minute deals on Portland to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Portland, Maine to London Heathrow Airport flight deals updated?

    The Portland, Maine to London Heathrow Airport flight deals you see on this page were last updated on 6/6.

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

    Consider American Airlines, Delta or United Airlines when booking your flight. These represent the most popular airlines when flying from Portland, Maine to London Heathrow Airport.

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

    Currently, November is the cheapest month in which you can book a flight from Portland, Maine to London Heathrow Airport (average of $653). Flying from Portland, Maine to London Heathrow Airport in June is currently the most expensive (average of $1,102). 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

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

Boston to Heathrow flights
Boston to Gatwick flights
Boston to London City flights
Boston to Stansted flights
Boston to Luton flights
Portland to Gatwick flights
Bangor to Heathrow flights
Portland to London City flights
Boston to Southend flights

Top 3 airlines flying from Portland to Heathrow

Discover the top 3 airlines that operate flights from Portland to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 3,050,429 searches. Data last updated June 6, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$652Average$896FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$680Average$908FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$686Average$1,162FlexibilityNo cancel feeOn-time71%
Buffalo to New York flights
Honolulu to Las Vegas flights
Washington, D.C. to Los Angeles flights
Tampa to Detroit flights
Atlanta to Seattle flights
Los Angeles to Denver flights
Charlotte to Las Vegas flights
Miami to Mexico City flights
USA to Ireland flights
Nashville to Denver flights
Portland to New York flights
Portland, Maine to Lihue flights

Search flights from Portland to Heathrow by cabin class

Find flights from Portland to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Gaziantep
Flights to Miyakojima Hirara
Flights to Figari-Sud Corse
Flights to Mason City
Flights to Komatsu
Flights to Sendai
Flights to Rhinelander Oneida County
Flights to Constanţa Mihail Kogalniceanu
Flights to Brainerd Crow Wing County
Flights to Reus
Flights to Virac
Flights to Neiva La Marguita
Flights to Pellston Emmet County
Flights to Urumqi
Flights to Bastia Poretta
Flights to Samos
Flights to Hyannis Barnstable
Flights to Provincetown
Flights to Alghero-Fertilia
Flights to Laayoune Hassan I
Flights to Devils Lake
Flights to Vava'u Lupepau'U
Flights to Hakodate
Flights to Edremit/Korfez
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.
View all available airlines