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$547+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PHL
May 17 — May 241
Sun 5/17
Sun 5/24
1 adult, Economy
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Find cheap flights from London to Philadelphia with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from London to Philadelphia are usually found in September or November, booked 73 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap 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 April 17, 2026.

This deal was found by Cheapflights users on 4/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/211:45 pm
LHR
-
PHL
Nonstop7h 50m
British Airways
Sun 5/246:40 pm
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 4/13$762
This Justfly.com deal was found by Cheapflights users on 4/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/212:20 pm
LGW
-
PHL
1 stop25h 11m
JetBlue
Wed 7/18:28 am
PHL
-
LGW
1 stop20h 07m
JetBlue
Deal found 4/12$762
This deal was found by Cheapflights users on 4/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:45 pm
LHR
-
PHL
Nonstop7h 50m
British Airways
Fri 5/296:40 pm
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 4/13$764
This deal was found by Cheapflights users on 4/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/201:45 pm
LHR
-
PHL
Nonstop7h 50m
British Airways
Tue 5/266:40 pm
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 4/13$765
This Globehunters deal was found by Cheapflights users on 4/13. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:40 am
LHR
-
PHL
1 stop16h 20m
JetBlue
Wed 7/158:28 am
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 4/13$770
This Globehunters deal was found by Cheapflights users on 4/14. 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 Globehunters is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1812:20 pm
LGW
-
PHL
1 stop24h 18m
JetBlue
Mon 6/298:55 pm
PHL
-
LGW
1 stop31h 40m
JetBlue
Deal found 4/14$772
This Mytrip deal was found by Cheapflights users on 4/12. 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.
Mon 5/186:05 pm
LTN
-
PHL
2 stops27h 00m
Multiple Airlines
Mon 5/255:40 pm
PHL
-
LTN
2 stops19h 25m
Multiple Airlines
Deal found 4/12$773
This deal was found by Cheapflights users on 4/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/239:30 am
LHR
-
PHL
1 stop10h 18m
Air Canada
Sat 5/303:25 pm
PHL
-
LHR
1 stop13h 35m
Air Canada
Deal found 4/13$774
This The Travel House deal was found by Cheapflights users on 4/12. 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 The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/77:30 am
LHR
-
PHL
1 stop13h 35m
Lufthansa
Sat 9/124:20 pm
PHL
-
LHR
2 stops33h 10m
Lufthansa
Deal found 4/12$776
This deal was found by Cheapflights users on 4/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/228:30 am
LHR
-
PHL
1 stop12h 08m
Air Canada
Sat 5/303:25 pm
PHL
-
LHR
1 stop13h 35m
Air Canada
Deal found 4/13$778
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/232:00 pm
LGW
-
PHL
1 stop26h 55m
Multiple Airlines
Wed 10/73:10 pm
PHL
-
LGW
1 stop13h 50m
Multiple Airlines
Deal found 4/15$778
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:00 pm
LGW
-
PHL
1 stop23h 54m
Multiple Airlines
Sun 6/79:16 pm
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Deal found 4/16$781

Find 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 April 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$762

One-way from

$547
(KAYAK)

Popular in

December

Cheapest in

September

Average price

$843

Good round-trip deal

$824 or less

Good one-way deal

$624 or less
Provider with most accurate pricing for London (LON)-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Philadelphia flights.
Search Deals
From London (LON) to Philadelphia
Search Deals
One-way flight from London (LON) to Philadelphia
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from London (LON) to Philadelphia.
Search Deals
Price to beat on a one-way flight from London (LON) to Philadelphia.
Search Deals

Cheapflights Fare Finder

 
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 April 17, 2026.
Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 9/21

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Mon 9/28

7:00 am-9:00 pm

2 stops33h 00m

$788

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/4

9:00 am-12:59 am

2 stops20h 59m

Philadelphia

Mon 5/18

6:00 am-6:30 am

2 stops19h 30m

$822

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 9/21

12:05 pm-9:50 am

2 stops26h 45m

Philadelphia

Mon 9/28

10:45 am-9:45 am

2 stops18h 00m

$840

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 9/21

2:00 pm-11:55 am

1 stop26h 55m

Philadelphia

Mon 9/28

12:50 pm-10:00 am

1 stop16h 10m

$853

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sun 9/6

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Sat 9/12

7:00 am-8:35 am

2 stops20h 35m

$863

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 9/21

9:25 am-5:42 pm

2 stops37h 17m

Philadelphia

Mon 10/12

11:39 am-8:25 am

2 stops15h 46m

$865

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Sun 5/31

11:00 am-4:05 pm

3 stops34h 05m

Philadelphia

Sun 6/7

3:25 pm-1:45 pm

2 stops17h 20m

$871

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 4/29

7:30 am-4:05 pm

1 stop13h 35m

Philadelphia

Sun 5/10

8:30 pm-6:45 am

1 stop29h 15m

$882

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 5/18

7:30 am-4:05 pm

1 stop13h 35m

Philadelphia

Mon 5/25

3:10 pm-6:55 am

1 stop10h 45m

$882

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Tue 5/12

9:15 am-4:05 pm

1 stop11h 50m

Philadelphia

Tue 5/19

5:40 pm-5:55 pm

1 stop19h 15m

$904

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 60 resultsSorted by cheapest first
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 stars

*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.

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.

Cheapflights Insights

Everything you need to know about your flight from London to Philadelphia

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 April 10, 2026.

The best time to book flights from London to Philadelphia is 73 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, February is the cheapest month in which you can book a flight from London to Philadelphia (average of $360). Flying from London to Philadelphia in May is currently the most expensive (average of $2,061). 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 April 17, 2026.

When flying from London to Philadelphia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 April 17, 2026.

The most flights from LON to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (15 on average).

How much does it cost to fly round-trip from London to Philadelphia?

What’s the top layover airport for flights from London to Philadelphia?

Share of 1-stop round-trip flights from London to Philadelphia chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dublin (DUB) – chosen by Cheapflights users on 71% of 1-stop itineraries from London to Philadelphia on Cheapflights.

What’s the cheapest layover airport for flights from London to Philadelphia?

Average round-trip fare for 1-stop flights from London to Philadelphia, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Boston (BOS) is the most affordable 1-stop option, with an average round-trip price of $872.

What’s the fastest layover option from London to Philadelphia?

Shortest average travel time for 1-stop one-way flights from London to Philadelphia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 10h 23m.

Which airport typically offers the quickest layover for flights from London to Philadelphia?

Average layover duration for 1-stop one-way flights from London to Philadelphia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dublin (DUB) offer the fastest connection on this route, with an average layover time of 1h 48m.

How often are flights from London to Philadelphia delayed?

About 17% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 175 minutes.

What is the most punctual flight time for London to Philadelphia flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on London to Philadelphia flights?

Over the last year, British Airways have had the lowest number of delays on this route, with just 16% of flights being delayed.

The best insider tips for London to Philadelphia flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Philadelphia trip
Our travel experts
Mark Chesnut

Mark Chesnut

Expert on PHL

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

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

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 April 17, 2026.
Get a feel of what it's like to fly with Aer Lingus,American Airlines, andIberia from London to Philadelphia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.6

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,512 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.6

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
American Airlines
7.1
Good
11,593 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.6

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Iberia
7.0
Good
3,182 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.6

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
British Airways
6.7
Okay
7,889 reviews
Aer Lingus
7.3
Good
1,512 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.6

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

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 15 daily inbound flights from London from 3 different airlines.

  • How long is the flight from London to Philadelphia?

    JetBlue, United Airlines, and SWISS can get you from London to Philadelphia in just under 11h 35m. Your travel time can differ by up to 25h 52m. There are 3533 mi between London and Philadelphia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, British Airways ($614), American Airlines ($646), and Aer Lingus ($670) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 21% 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 Finnair ($466), Aer Lingus ($479), and American Airlines ($490).

  • 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 (79%), American Airlines (73%), Finnair (73%).

  • What are the cheapest flights from London to Philadelphia?

    While on average a flight from London to Philadelphia is generally $1,383, our data shows the cheapest flight currently is $568. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $705 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, February is the cheapest month in which you can book a flight from London to Philadelphia (average of $360). Flying from London to Philadelphia in May is currently the most expensive (average of $2,061). 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Reading
Camden
Ocean City
Lewes
Dewey Beach
Pottstown
Ephrata
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville
Glen Mills
Chester
Newark

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.

Top 3 airlines flying from London to Philadelphia

Discover the top 3 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 April 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$614Average$759FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$646Average$814FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$670Average$1,178FlexibilityNo cancel feeOn-timeN/A

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