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$543+ Cheap flights from London (LON) to Philadelphia (PHL)

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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PHL
Mar 19 — Mar 261
Wed 3/19
Wed 3/26
1 adult, Economy
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The best prices from London to Philadelphia are usually found in February or March, booked 66 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from London to Philadelphia

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Philadelphia (PHL). 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 March 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$577
(Ticket)

One-way from

$543
(Gurufare)

Popular in

August

Cheapest in

February

Average price

$677

Good round-trip deal

$745 or less

Good one-way deal

$689 or less
Provider with most accurate pricing for London (LON)-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for London (LON)-Philadelphia flights.
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From London (LON) to Philadelphia
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One-way flight from London (LON) to Philadelphia
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from London (LON) to Philadelphia.
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Price to beat on a one-way flight from London (LON) to Philadelphia.
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Find flight deals from London to Philadelphia

Cheapest flights from London to Philadelphia
Explore the most affordable flight options available from London to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 14, 2025.

This Ticket deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/289:30 amLHR - PHL
1 stop10h 17mAir Canada
Mon 5/53:20 pmPHL - LHR
1 stop13h 40mAir Canada
Deal found 3/13$577
This Mytrip deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/12:00 pmLGW - PHL
1 stop34h 36mMultiple Airlines
Wed 5/147:55 pmPHL - LGW
1 stop33h 05mMultiple Airlines
Deal found 3/13$577
This The Travel House deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/193:50 pmLHR - PHL
1 stop28h 53mLufthansa
Mon 4/285:35 pmPHL - LHR
1 stop18h 05mLufthansa
Deal found 3/13$587
This American Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/307:50 amLHR - PHL
1 stop13h 05mAmerican Airlines
Thu 5/82:00 pmPHL - LHR
1 stop11h 15mAmerican Airlines
Deal found 3/13$588
This Mytrip deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/211:40 amSTN - PHL
3 stops35h 37mMultiple Airlines
Sat 4/56:00 amPHL - STN
3 stops23h 40mMultiple Airlines
Deal found 3/12$590
This The Travel House deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2112:10 pmLGW - PHL
1 stop26h 30mIcelandair
Thu 10/26:37 pmPHL - LGW
1 stop9h 58mIcelandair
Deal found 3/13$591
This TravelUp deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/27:30 amLHR - PHL
1 stop13h 30mMultiple Airlines
Fri 5/163:20 pmPHL - LHR
1 stop10h 10mMultiple Airlines
Deal found 3/13$596
This United Airlines deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/287:25 amLHR - PHL
2 stops20h 08mUnited Airlines
Mon 5/56:30 amPHL - LHR
1 stop20h 50mUnited Airlines
Deal found 3/13$601
This Ticket deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2812:30 pmLHR - PHL
Nonstop7h 45mFinnair
Mon 5/57:55 pmPHL - LHR
Nonstop7h 10mFinnair
Deal found 3/13$610
This Expedia deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/196:30 amLHR - PHL
1 stop14h 55mBritish Airways
Wed 3/2610:15 pmPHL - LHR
Nonstop7h 05mBritish Airways
Deal found 3/12$617
This Mytrip deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1210:10 pmLTN - PHL
1 stop18h 30mMultiple Airlines
Mon 4/216:50 pmPHL - LTN
1 stop9h 10mMultiple Airlines
Deal found 3/13$671
This Delta deal was found by Cheapflights users on 3/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/88:40 amLHR - PHL
2 stops17h 44mDelta
Tue 4/1510:25 amPHL - LHR
2 stops17h 30mDelta
Deal found 3/13$681

Find flights from London to Philadelphia within your budget

Customize your flight search to find flights from London to Philadelphia 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 2,558,603 searches. Data last updated March 14, 2025.

Fly from

London

Fly to

Philadelphia

Route

Depart

Return

Price

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/28

9:30 am-2:47 pm

1 stop10h 17m

Philadelphia

Mon 5/5

3:20 pm-10:00 am

1 stop13h 40m

$577

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Thu 5/1

2:00 pm-7:36 pm

1 stop34h 36m

Philadelphia

Wed 5/14

7:55 pm-10:00 am

1 stop33h 05m

$577

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 4/19

3:50 pm-3:43 pm

1 stop28h 53m

Philadelphia

Mon 4/28

5:35 pm-4:40 pm

1 stop18h 05m

$587

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 4/30

7:50 am-3:55 pm

1 stop13h 05m

Philadelphia

Thu 5/8

2:00 pm-6:15 am

1 stop11h 15m

$588

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Wed 4/2

11:40 am-6:17 pm

3 stops35h 37m

Philadelphia

Sat 4/5

6:00 am-10:40 am

3 stops23h 40m

$590

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Fri 5/2

7:30 am-4:00 pm

1 stop13h 30m

Philadelphia

Fri 5/16

3:20 pm-6:30 am

1 stop10h 10m

$596

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/28

7:25 am-10:33 pm

2 stops20h 08m

Philadelphia

Mon 5/5

6:30 am-8:20 am

1 stop20h 50m

$601

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 4/28

12:30 pm-3:15 pm

Nonstop7h 45m

Philadelphia

Mon 5/5

7:55 pm-8:05 am

Nonstop7h 10m

$610

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 3/26

10:40 am-5:25 pm

1 stop10h 45m

Philadelphia

Wed 4/2

6:01 pm-7:50 am

1 stop8h 49m

$618

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Sat 6/7

12:10 pm-11:27 pm

1 stop16h 17m

Philadelphia

Thu 7/17

10:25 am-9:35 am

1 stop18h 10m

$619

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/13

Showing 1-10 of 55 results
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Compare providers for flights from London to Philadelphia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Philadelphia in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Philadelphia flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Philadelphia flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from London-Philadelphia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Philadelphia flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Philadelphia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for London to Philadelphia flights

Find out what our experts recommend to make the most of your London to Philadelphia trip
Airports
LHR

Expect long security lines at Heathrow. Ensure liquids are in a small bag to avoid delays during manual screenings.

Read more about LHRby Ramsey Qubein
PHL

For quick access to downtown Philadelphia, take the SEPTA Airport Line. It's efficient and operates from 5:00 a.m. to midnight.

Read more about PHLby Mark Chesnut
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

Mark Chesnut

Mark Chesnut

Mark Chesnut is a travel writer and public speaker with more than 30 years of experience. The 2019 winner of the NLGJA Excellence in Travel Writing Award, Mark is the author of the book “Prepare for Departure” and has covered air travel for multiple top consumer and trade media outlets.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.

Best time to book a flight from London to Philadelphia

Have a flexible travel schedule? Discover the best time to fly to Philadelphia from London 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.

Travel insights for flights from London to Philadelphia

Get recent, data-driven insights about flights from London to Philadelphia including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from London to Philadelphia?

Use this chart to determine the optimal time to book a round-trip flight from London to Philadelphia. Price data was last updated on March 7, 2025.

The best time to book flights from London to Philadelphia is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from London to Philadelphia?

Currently, August is the cheapest month in which you can book a flight from London to Philadelphia (average of $236). Flying from London to Philadelphia in March is currently the most expensive (average of $295). 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.

What is the cheapest time of day to fly from LON to PHL?

Find hourly flight availability from London to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 14, 2025.

When flying from London to Philadelphia, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 17% versus a flight in the morning.

Weekly flight availability from London to Philadelphia

Explore weekly flight availability from London to Philadelphia. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated March 14, 2025.

The most flights from LON to PHL are scheduled on a Wednesday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

Plan your trip to Philadelphia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Philadelphia, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated March 14, 2025.
Peruse reviews from past customers who have flown with Delta, Finnair and SWISS from London to Philadelphia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very good
7,944 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Finnair
7.6
Good
1,268 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

SWISS
7.5
Good
1,564 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

United Airlines
7.4
Good
8,623 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic
7.4
Good
639 reviews
Delta
8.0
Very good
7,944 reviews

Comfort

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from London to Philadelphia. 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 into for flights to Philadelphia from London?

    Located just 7.0 mi from the city center, Philadelphia is the airport most travelers will use when flying to Philadelphia from London. Booking flights from London to Philadelphia (PHL) should be relatively easy as there are 9 daily inbound flights from London from 5 different airlines.

  • What are the cheapest airlines flying from London to Philadelphia round-trip?

    According to our current data, Air Canada ($577), Lufthansa ($587), and American Airlines ($588) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 23% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from London to Philadelphia one-way?

    The cheapest airlines for a one-way flight from London to Philadelphia are Aer Lingus ($543), Iberia ($579), and Lufthansa ($605).

  • What are the most popular routes from London to Philadelphia?

    When deciding which route to take from London to Philadelphia consider London Heathrow - Philadelphia, London Gatwick - Philadelphia or London City - Philadelphia as they are the most popular.

  • What are the most reliable airlines from London to Philadelphia?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from London to Philadelphia on time: Malaysia Airlines (80%), American Airlines (77%), Finnair (77%).

  • What are the cheapest flights from London to Philadelphia?

    While on average a flight from London to Philadelphia is generally $1,450, our data shows the cheapest flight currently is $598. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $555 for that flight.

  • Can I find deals for flights from London to Philadelphia that include hotel bookings?

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

  • How can I find direct flights from London to Philadelphia?

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

  • Can I find deals for business class flights from London to Philadelphia?

    Yes. Cheapflights offers flight deals from London to Philadelphia 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 London to Philadelphia?

    Currently, August is the cheapest month in which you can book a flight from London to Philadelphia (average of $236). Flying from London to Philadelphia in March is currently the most expensive (average of $295). 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

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
King of Prussia
Vineland
Pottstown
Reading
Wildwood
Exton
Ocean City
Cherry Hill
Essington
Chester
Willow Grove
Newark
Middletown
Millville
Ephrata
Wyomissing
Dewey Beach
West Chester
Malvern
Dover

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Alternative routes for London to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from London to Philadelphia

Discover the top 5 airlines that operate flights from London to Philadelphia. 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 2,558,603 searches. Data last updated March 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$583Average$804FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$596Average$771FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$635Average$863FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$644Average$859FlexibilityNo cancel feeOn-time77%
FinnairCheapest$648Average$773FlexibilityNo cancel feeOn-time76%
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