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Cheap flights from Portland (PWM) to Heathrow (LHR) from $664

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/24. 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
Apr 24 — May 11
From?
To?
Wed 4/24
Wed 5/1
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 April 19, 2024.

Popular in

July

Cheapest in

November

Average price

$827

Round-trip from

$644
High demand for flights, 31% potential price rise
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Best time to find cheap flights, 23% potential price drop
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Average for round-trip flights in April 2024
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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 Tuesday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

How far in advance should I book a flight from Portland, Maine to London Heathrow Airport?

To save on the cost of your flight from Portland, Maine to London Heathrow Airport, book at least 44 days before your planned departure. Booking around this time can save you about 15% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $649 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $765.

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

January can be a great time to fly to London Heathrow Airport from Portland, Maine with a flight ticket averaging about $683. Cheapflights users have found deals in the month of January for as cheap as $370. The most expensive prices can be found in the month of June.

When is the cheapest time to fly from Portland, Maine to London Heathrow Airport (PWM - 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 Delta flights from Portland to Heathrow

Explore cheap flight options specifically provided by Delta for the route between Portland and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated April 19, 2024.
Take a peek at the cheapest Delta flights we've detected traveling from Portland to London. Deals update often to give you more flight options matching your criteria
Tue 5/72:51 pmPWM - LHR
1 stop14h 24mDelta
Fri 5/178:40 amLHR - PWM
2 stops20h 17mDelta
Deal found 4/18$759
Thu 8/152:35 pmPWM - LHR
1 stop16h 40mDelta
Wed 8/219:00 amLHR - PWM
2 stops19h 50mDelta
Deal found 4/18$833
Thu 8/152:35 pmPWM - LHR
1 stop13h 50mDelta
Wed 8/2112:45 pmLHR - PWM
1 stop15h 54mDelta
Deal found 4/18$840
Thu 8/1512:55 pmPWM - LHR
2 stops14h 05mDelta
Wed 8/2111:30 amLHR - PWM
2 stops17h 20mDelta
Deal found 4/18$850
Wed 7/175:03 pmPWM - LHR
2 stops15h 12mDelta
Wed 7/2411:30 amLHR - PWM
2 stops17h 44mDelta
Deal found 4/18$1,022
Tue 7/92:08 pmPWM - LHR
1 stop11h 37mDelta
Wed 7/1711:30 amLHR - PWM
2 stops17h 44mDelta
Deal found 4/18$1,067
Tue 7/95:03 pmPWM - LHR
2 stops15h 12mDelta
Wed 7/1711:30 amLHR - PWM
2 stops17h 44mDelta
Deal found 4/18$1,072
Tue 5/212:51 pmPWM - LHR
1 stop13h 34mDelta
Thu 5/309:00 amLHR - PWM
2 stops19h 57mDelta
Deal found 4/18$1,092
Sat 5/182:51 pmPWM - LHR
1 stop16h 24mDelta
Sat 5/258:40 amLHR - PWM
2 stops20h 04mDelta
Deal found 4/18$1,194

Cheap KLM flights from Portland to Heathrow

Explore cheap flight options specifically provided by KLM for the route between Portland and Heathrow. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 3,192,047 searches. Data last updated April 19, 2024.
Take a gander at the lowest prices we've found on KLM flights from Portland to London. Check back soon if you're not seeing flights that suit your needs.
Tue 5/72:51 pmPWM - LHR
1 stop14h 24mKLM
Fri 5/1710:50 amLHR - PWM
1 stop18h 07mKLM
Deal found 4/18$764
Wed 7/172:08 pmPWM - LHR
1 stop12h 57mKLM
Wed 7/2410:50 amLHR - PWM
1 stop18h 24mKLM
Deal found 4/18$1,024
Tue 7/92:08 pmPWM - LHR
1 stop12h 57mKLM
Wed 7/1711:35 amLHR - PWM
1 stop15h 19mKLM
Deal found 4/18$1,074
Tue 4/302:55 pmPWM - LHR
1 stop12h 10mKLM
Fri 5/311:35 amLHR - PWM
1 stop15h 31mKLM
Deal found 4/18$2,088

Cheap Portland to Heathrow flights in April & May 2024

Find cheap flight options from Portland to Heathrow specifically for the months of April and May 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,192,047 searches. Prices were last updated on April 19, 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 5/72:51 pmPWM - LHR
1 stop14h 24mDelta
Fri 5/178:40 amLHR - PWM
2 stops20h 17mDelta
Deal found 4/18$759
Tue 5/72:51 pmPWM - LHR
1 stop14h 24mKLM
Fri 5/1710:50 amLHR - PWM
1 stop18h 07mKLM
Deal found 4/18$764
Tue 5/712:35 pmPWM - LHR
2 stops13h 15mAmerican Airlines
Fri 5/179:35 amLHR - PWM
2 stops18h 06mAmerican Airlines
Deal found 4/18$768
Sat 5/182:19 pmPWM - LHR
1 stop14h 11mJetBlue
Sat 5/257:25 amLHR - PWM
1 stop11h 04mJetBlue
Deal found 4/18$847
Tue 5/212:19 pmPWM - LHR
1 stop14h 11mJetBlue
Thu 5/307:25 amLHR - PWM
1 stop11h 04mJetBlue
Deal found 4/18$913
Tue 5/212:51 pmPWM - LHR
1 stop13h 34mDelta
Thu 5/309:00 amLHR - PWM
2 stops19h 57mDelta
Deal found 4/18$1,092
Tue 5/215:30 pmPWM - LHR
2 stops12h 00mAmerican Airlines
Thu 5/309:35 amLHR - PWM
2 stops18h 06mAmerican Airlines
Deal found 4/18$1,103
Sat 5/182:51 pmPWM - LHR
1 stop16h 24mDelta
Sat 5/258:40 amLHR - PWM
2 stops20h 04mDelta
Deal found 4/18$1,194
Sat 5/1812:35 pmPWM - LHR
2 stops15h 00mAmerican Airlines
Sat 5/2512:15 pmLHR - PWM
2 stops15h 26mAmerican Airlines
Deal found 4/18$1,203

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 3,192,047 searches. Data last updated April 19, 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 9/241:10 pmPWM - LHR
1 stop15h 20mJetBlue
Tue 10/111:55 amLHR - PWM
1 stop14h 33mJetBlue
Deal found 4/18$664
Wed 10/91:10 pmPWM - LHR
1 stop15h 20mJetBlue
Tue 10/1511:55 amLHR - PWM
1 stop14h 33mJetBlue
Deal found 4/18$679
Wed 9/251:10 pmPWM - LHR
1 stop15h 20mJetBlue
Tue 10/88:25 amLHR - PWM
1 stop18h 03mJetBlue
Deal found 4/18$694
Tue 9/244:17 pmPWM - LHR
1 stop13h 33mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops17h 24mAmerican Airlines
Deal found 4/18$707
Tue 9/244:17 pmPWM - LHR
2 stops13h 38mAmerican Airlines
Tue 10/19:50 amLHR - PWM
2 stops17h 24mAmerican Airlines
Deal found 4/18$710
Thu 9/54:17 pmPWM - LHR
1 stop10h 28mAmerican Airlines
Tue 9/179:50 amLHR - PWM
2 stops17h 24mAmerican Airlines
Deal found 4/18$723
Thu 9/51:18 pmPWM - LHR
2 stops12h 37mAmerican Airlines
Tue 9/179:50 amLHR - PWM
2 stops17h 24mAmerican Airlines
Deal found 4/18$728
Wed 10/97:27 pmPWM - LHR
1 stop10h 13mUnited Airlines
Tue 10/156:50 amLHR - PWM
2 stops17h 56mUnited Airlines
Deal found 4/18$729
Wed 10/93:05 pmPWM - LHR
2 stops14h 35mUnited Airlines
Tue 10/156:50 amLHR - PWM
2 stops17h 56mUnited Airlines
Deal found 4/18$733

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 3,192,047 searches. Data last updated April 19, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$664 - $1,017

Route

Depart

Return

Price

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop15h 20m

London Heathrow

Tue 10/1

1 stop14h 33m

$664

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 10/9

1 stop15h 20m

London Heathrow

Tue 10/15

1 stop14h 33m

$679

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 9/24

1 stop13h 33m

London Heathrow

Tue 10/1

2 stops17h 24m

$707

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 10/9

1 stop10h 13m

London Heathrow

Tue 10/15

2 stops17h 56m

$729

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 9/25

3 stops17h 32m

London Heathrow

Tue 10/8

3 stops25h 23m

$749

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 5/7

1 stop14h 24m

London Heathrow

Fri 5/17

2 stops20h 17m

$759

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Tue 5/7

1 stop14h 24m

London Heathrow

Fri 5/17

1 stop18h 07m

$764

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 9/25

3 stops17h 32m

London Heathrow

Sun 9/29

2 stops14h 14m

$893

PortlandLondon Heathrow

PWM - LHR

PWMLHR

Portland

Wed 7/17

1 stop18h 50m

London Heathrow

Wed 7/24

2 stops19h 24m

$1,017

Flights are sorted by cheapest first

Deals found on 4/18

When is the cheapest time 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 April 14, 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 Tuesday afternoons 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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Average price of flights to Heathrow by month

Plan your trip from Portland to Heathrow by taking into account the cheapest months to travel. The average price of a one-way flight from Portland to Heathrow is currently $0 while a round-trip flight costs $773. Price data was last updated on April 14, 2024.

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 $1,177). 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.

January

$676

February

$664

March

$715

April

$705

May

$753

June

$1,177

July

$989

August

$780

September

$749

October

$713

November

$653

December

$673

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

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 April 19, 2024.
Read reviews from past customers who have flown Delta, KLM and American Airlines from Portland to London. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Delta
8.1
Very good
11,102 reviews
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

KLM
7.9
Good
1,645 reviews
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

Virgin Atlantic
7.7
Good
750 reviews
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

JetBlue
7.7
Good
4,669 reviews
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

United Airlines
7.4
Good
11,333 reviews
Delta
8.1
Very good
11,102 reviews
Check prices

Entertainment

8.0

Crew

8.6

Comfort

7.9

Boarding

8.2

Overall

8.1

Food

7.5

Reviews

1 / 10

Terrible flight crew that skipped our row for service multiple times.

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 $664, but on average you can expect to pay $747.

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

    JetBlue, at $664, 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 29% lower than the current average price 3 months from now.

  • 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 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 4/18.

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.

Portland to Gatwick flights
Bangor to Heathrow flights
Portland to London City 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 3,192,047 searches. Data last updated April 19, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$652Average$896FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$686Average$896FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$710Average$1,163FlexibilityNo 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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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portland to Heathrow?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Heathrow from Portland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Portland to Heathrow?

Cheapflights helps you find that perfect flight to Heathrow 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 Heathrow with no change fees?

Yes, we can. To see specific flights from Portland to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Portland to Heathrow become cheaper?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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