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Cheap flights from Portland (PWM) to Heathrow (LHR) from $503

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 7/19. 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 13 — Jun 201
From?
To?
Thu 6/13
Thu 6/20
1 adult, Economy
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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 8, 2024.

Popular in

June

Cheapest in

December

Round-trip from

$643

One-way from

$568
High demand for flights, 32% potential price rise
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Best time to find cheap flights, 24% potential price drop
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From Portland to London Heathrow
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One-way flight from Portland to London Heathrow
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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 3,022,473 searches. Prices were last updated on June 8, 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.
Fri 7/52:01 pmPWM - LHR
1 stop17h 14mDelta
Fri 7/1211:45 amLHR - PWM
2 stops17h 25mDelta
Deal found 6/7$937
Fri 7/51:02 pmPWM - LHR
1 stop12h 43mKLM
Fri 7/1210:50 amLHR - PWM
1 stop18h 20mKLM
Deal found 6/7$941
Mon 7/82:09 pmPWM - LHR
1 stop12h 06mDelta
Mon 7/159:00 amLHR - PWM
2 stops20h 10mDelta
Deal found 6/8$954
Mon 7/82:09 pmPWM - LHR
1 stop11h 36mDelta
Mon 7/158:20 amLHR - PWM
1 stop20h 50mDelta
Deal found 6/8$961
Fri 7/52:01 pmPWM - LHR
2 stops12h 39mDelta
Fri 7/1211:45 amLHR - PWM
2 stops17h 25mDelta
Deal found 6/7$966
Tue 7/21:11 pmPWM - LHR
1 stop12h 34mDelta
Wed 7/318:40 amLHR - PWM
2 stops20h 30mDelta
Deal found 6/7$1,060
Tue 7/21:11 pmPWM - LHR
2 stops16h 04mDelta
Wed 7/318:40 amLHR - PWM
2 stops20h 30mDelta
Deal found 6/7$1,064
Mon 7/86:15 amPWM - LHR
2 stops33h 45mAir Canada
Mon 7/158:30 amLHR - PWM
2 stops30h 30mAir Canada
Deal found 6/8$1,109
Fri 6/216:00 amPWM - LHR
1 stop20h 45mAmerican Airlines
Fri 6/289:45 amLHR - PWM
1 stop17h 50mAmerican Airlines
Deal found 6/7$1,114

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 3,022,473 searches. Data last updated June 8, 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 6/7$612
Tue 9/2412:21 pmPWM - LHR
1 stop17h 54mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops16h 25mAmerican Airlines
Deal found 6/7$617
Tue 9/244:17 pmPWM - LHR
2 stops13h 03mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops16h 25mAmerican Airlines
Deal found 6/7$620
Tue 10/86:00 amPWM - LHR
1 stop9h 40mUnited Airlines
Tue 10/226:50 amLHR - PWM
2 stops17h 56mUnited Airlines
Deal found 6/7$640
Tue 11/266:05 amPWM - LHR
1 stop20h 10mVirgin Atlantic
Mon 12/28:25 pmLHR - PWM
2 stops31h 41mVirgin Atlantic
Deal found 6/7$644
Tue 9/242:52 pmPWM - LHR
1 stop12h 13mKLM
Tue 10/110:50 amLHR - PWM
1 stop18h 18mKLM
Deal found 6/7$648
Tue 10/81:18 pmPWM - LHR
1 stop12h 22mMultiple Airlines
Tue 10/221:40 pmLHR - PWM
1 stop13h 34mMultiple Airlines
Deal found 6/7$649
Tue 10/85:29 pmPWM - LHR
2 stops12h 46mAmerican Airlines
Tue 10/221:40 pmLHR - PWM
2 stops14h 58mAmerican Airlines
Deal found 6/7$653
Tue 11/2611:26 amPWM - LHR
2 stops14h 14mUnited Airlines
Mon 12/211:10 amLHR - PWM
2 stops17h 01mUnited Airlines
Deal found 6/7$689

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 3,022,473 searches. Data last updated June 8, 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.
Fri 6/216:00 amPWM - LHR
1 stop20h 45mAmerican Airlines
Fri 6/289:45 amLHR - PWM
1 stop17h 50mAmerican Airlines
Deal found 6/7$1,114
Thu 6/204:13 pmPWM - LHR
1 stop13h 17mAmerican Airlines
Thu 6/2712:15 pmLHR - PWM
1 stop15h 28mAmerican Airlines
Deal found 6/7$1,115
Thu 6/204:13 pmPWM - LHR
1 stop13h 17mAmerican Airlines
Thu 6/2712:30 pmLHR - PWM
2 stops16h 23mAmerican Airlines
Deal found 6/7$1,119
Fri 6/2112:29 pmPWM - LHR
1 stop18h 46mAmerican Airlines
Fri 6/289:30 amLHR - PWM
2 stops18h 05mAmerican Airlines
Deal found 6/7$1,125
Thu 6/209:45 amPWM - LHR
2 stops15h 10mUnited Airlines
Thu 6/278:30 amLHR - PWM
2 stops17h 25mUnited Airlines
Deal found 6/7$1,126
Sat 6/225:05 amPWM - LHR
1 stop10h 05mDelta
Wed 6/2611:30 amLHR - PWM
2 stops17h 54mDelta
Deal found 6/8$1,127
Sat 6/225:05 amPWM - LHR
1 stop10h 05mDelta
Wed 6/269:55 amLHR - PWM
1 stop19h 29mDelta
Deal found 6/8$1,134
Fri 6/213:50 pmPWM - LHR
2 stops24h 10mUnited Airlines
Fri 6/288:00 amLHR - PWM
2 stops16h 45mUnited Airlines
Deal found 6/7$1,139
Fri 6/216:00 amPWM - LHR
1 stop20h 45mAmerican Airlines
Sun 6/239:30 amLHR - PWM
2 stops18h 05mAmerican Airlines
Deal found 6/8$1,178

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 3,022,473 searches. Data last updated June 8, 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.
Fri 7/191:05 pmPWM - LHR
3 stops25h 35mMultiple Airlines
Deal found 6/7$503
Fri 7/51:05 pmPWM - LHR
3 stops25h 35mMultiple Airlines
Deal found 6/7$525
Fri 7/57:39 pmPWM - LHR
2 stops45h 01mMultiple Airlines
Deal found 6/7$557
Thu 7/189:40 amPWM - LHR
1 stop16h 05mUnited Airlines
Deal found 6/7$568
Sat 7/2011:30 amPWM - LHR
3 stops17h 30mAir Canada
Deal found 6/7$574
Mon 7/19:45 amPWM - LHR
2 stops18h 55mMultiple Airlines
Deal found 6/7$603
Mon 7/11:03 pmPWM - LHR
3 stops24h 22mMultiple Airlines
Deal found 6/7$611
Sat 7/209:45 amPWM - LHR
2 stops24h 50mMultiple Airlines
Deal found 6/7$630
Mon 7/11:09 pmPWM - LHR
1 stop13h 36mAmerican Airlines
Deal found 6/7$784

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 3,022,473 searches. Data last updated June 8, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$612 - $1,132

Route

Depart

Return

Price

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/8

1 stop15h 24m

London Heathrow

Tue 10/22

1 stop14h 34m

$612

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop17h 54m

London Heathrow

Tue 10/1

2 stops16h 25m

$617

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/8

1 stop9h 40m

London Heathrow

Tue 10/22

2 stops17h 56m

$640

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 11/26

1 stop20h 10m

London Heathrow

Mon 12/2

2 stops31h 41m

$644

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 10/8

1 stop12h 22m

London Heathrow

Tue 10/22

1 stop13h 34m

$649

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 9/25

1 stop14h 23m

London Heathrow

Sun 9/29

2 stops20h 08m

$691

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 10/8

3 stops16h 45m

London Heathrow

Tue 10/22

3 stops25h 31m

$738

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 8/6

1 stop14h 40m

London Heathrow

Wed 8/21

2 stops17h 34m

$1,132

Flights are sorted by cheapest first

Deals found on 6/7

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.
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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 8, 2024.
Read reviews from past customers who have flown American Airlines, United Airlines and KLM 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
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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
10,333 reviews
Delta
8.0
Very good
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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
1,480 reviews
Delta
8.0
Very good
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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
996 reviews
Delta
8.0
Very good
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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.

JetBlue
7.6
Good
4,300 reviews
Delta
8.0
Very good
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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.

Virgin Atlantic
7.6
Good
716 reviews
Delta
8.0
Very good
10,333 reviews

Comfort

7.9

Food

7.4

Overall

8.0

Boarding

8.2

Crew

8.6

Entertainment

8.0

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 JetBlue for just $612, but on average you can expect to pay $683.

  • Are there last-minute flights available from Portland, Maine to London Heathrow Airport for under $1,200?

    There are currently 20+ open flights from Portland, Maine to London Heathrow Airport within the next 7 days for less than $1,200.

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

    JetBlue, at $612, was found to be the cheapest airline from Portland, Maine to London Heathrow Airport.Alternate airlines to your destination round-trip include American Airlines 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 $568. 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 6/7.

  • 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

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

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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 3,022,473 searches. Data last updated June 8, 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%
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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.
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