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$478+ 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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PHL
Nov 1 — Nov 81
Sat 11/1
Sat 11/8
1 adult, Economy
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Find cheap flights from London to Philadelphia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from London to Philadelphia are usually found in February or September, booked 16 days in advance, depart on a Tuesday or Thursday 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 October 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$588
(Air Canada)

One-way from

$478
(Justfly.com)

Popular in

August

Cheapest in

February

Average price

$689

Good round-trip deal

$637 or less

Good one-way deal

$656 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
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Highest demand for flights based on searches. 7% potential increase in price ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 2, 2025.

This Air Canada deal was found by Cheapflights users on 9/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:50 amLHR - PHL
2 stops12h 57mAir Canada
Thu 12/43:30 pmPHL - LHR
1 stop10h 40mAir Canada
Deal found 9/30$588
This British Airways deal was found by Cheapflights users on 9/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2312:45 pmLHR - PHL
1 stop30h 10mBritish Airways
Wed 12/33:08 pmPHL - LHR
1 stop10h 52mBritish Airways
Deal found 9/30$589
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Thu 10/169:30 amLHR - PHL
1 stop11h 30mLufthansa
Thu 10/236:10 pmPHL - LHR
1 stop11h 30mLufthansa
Deal found 9/30$590
This Kiwi.com deal was found by Cheapflights users on 10/2. 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.
Mon 11/32:00 pmLGW - PHL
1 stop29h 17mMultiple Airlines
Mon 11/104:20 pmPHL - LGW
2 stops56h 40mMultiple Airlines
Deal found 10/2$590
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Tue 10/287:30 amLHR - PHL
2 stops15h 35mUnited Airlines
Tue 11/412:22 pmPHL - LHR
1 stop14h 33mUnited Airlines
Deal found 9/30$592
This British Airways deal was found by Cheapflights users on 9/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/186:30 amLHR - PHL
1 stop12h 25mBritish Airways
Wed 12/37:50 pmPHL - LHR
Nonstop7h 00mBritish Airways
Deal found 9/30$593
This JetBlue deal was found by Cheapflights users on 9/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/199:20 amLHR - PHL
1 stop11h 37mJetBlue
Wed 12/310:24 amPHL - LHR
1 stop15h 31mJetBlue
Deal found 9/30$596
This TravelUp deal was found by Cheapflights users on 10/1. 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.
Mon 11/39:20 amLHR - PHL
1 stop11h 37mJetBlue
Thu 4/3010:00 amPHL - LHR
1 stop15h 30mJetBlue
Deal found 10/1$598
This Air Canada deal was found by Cheapflights users on 9/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2810:30 amLHR - PHL
2 stops17h 26mMultiple Airlines
Wed 12/39:20 amPHL - LHR
2 stops16h 50mMultiple Airlines
Deal found 9/30$600
This Kiwi.com deal was found by Cheapflights users on 9/30. 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.
Fri 12/127:30 pmLHR - PHL
1 stop26h 05mLufthansa
Mon 12/153:30 pmPHL - LHR
1 stop10h 40mLufthansa
Deal found 9/30$601
This Kiwi.com deal was found by Cheapflights users on 10/2. 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.
Thu 10/309:00 amLTN - PHL
1 stop12h 00mMultiple Airlines
Thu 11/65:30 pmPHL - LTN
1 stop17h 30mMultiple Airlines
Deal found 10/2$602
This United Airlines deal was found by Cheapflights users on 9/30. 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.
Thu 10/168:30 amLHR - PHL
1 stop12h 30mUnited Airlines
Thu 10/233:00 pmPHL - LHR
1 stop14h 40mUnited Airlines
Deal found 9/30$603

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 October 2, 2025.
Use the filters below to find and compare flights from London to Philadelphia that are best for you.

Fly from

London

Fly to

Philadelphia

Route

Depart

Return

Price

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 10/30

9:00 am-5:00 pm

1 stop12h 00m

Philadelphia

Thu 11/6

5:30 pm-4:00 pm

1 stop17h 30m

$602

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Sun 11/16

8:05 am-4:00 pm

1 stop12h 55m

Philadelphia

Sun 11/23

5:30 pm-8:55 am

1 stop10h 25m

$622

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sun 11/16

8:30 am-4:00 pm

1 stop12h 30m

Philadelphia

Sun 11/23

5:30 pm-9:50 am

1 stop11h 20m

$625

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/22

1:30 pm-9:47 am

2 stops25h 17m

Philadelphia

Wed 10/29

12:40 pm-10:50 am

2 stops18h 10m

$626

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 3/5

9:20 am-6:31 pm

1 stop14h 11m

Philadelphia

Mon 3/9

4:48 pm-6:55 am

1 stop10h 07m

$637

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Thu 10/16

9:30 am-6:57 pm

2 stops14h 27m

Philadelphia

Thu 10/23

10:32 am-5:55 am

2 stops14h 23m

$637

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/29

6:35 am-9:21 pm

2 stops18h 46m

Philadelphia

Wed 11/5

9:20 am-8:35 pm

2 stops30h 15m

$639

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Wed 10/15

6:30 am-5:00 pm

2 stops15h 30m

Philadelphia

Wed 3/11

11:30 am-7:50 am

1 stop16h 20m

$643

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 10/14

8:40 am-7:14 pm

2 stops15h 34m

Philadelphia

Tue 3/10

9:42 am-6:20 am

2 stops16h 38m

$643

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Sat 12/27

4:20 pm-9:55 am

1 stop22h 35m

Philadelphia

Mon 1/5

5:00 pm-7:55 am

1 stop33h 55m

$655

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/1

Showing 1-10 of 60 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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Trip.comPrice Accuracy2 starsTrust 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 September 26, 2025.

The best time to book flights from London to Philadelphia is 16 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 October 2, 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 16% 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 October 2, 2025.

The most flights from LON to PHL are scheduled on a Wednesday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 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.

The best insider tips for London to Philadelphia flights

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.
Cheapflights partnered with top experts to bring you the best recommendations for your London to Philadelphia trip
Airports
LHR

Expect strict security at Heathrow. Ensure all liquids are in one small bag to avoid delays during manual screening.

Read more about LHRby Ramsey Qubein
PHL

Use SEPTA trains for efficient travel to Center City Philadelphia. Stations are near Terminals A, B, C/D, and E/F.

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

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 October 2, 2025.
Get a feel of what it's like to fly with Finnair, American Airlines, and Iberia 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.
Finnair
7.6
Good
1,332 reviews

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Finnair
7.6
Good
1,332 reviews
Finnair
7.6
Good
1,332 reviews

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
American Airlines
7.2
Good
11,033 reviews
Finnair
7.6
Good
1,332 reviews

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
Iberia
7.0
Good
2,969 reviews
Finnair
7.6
Good
1,332 reviews

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
British Airways
6.7
Okay
7,416 reviews
Finnair
7.6
Good
1,332 reviews

Crew

8.1

Food

6.7

Comfort

7.4

Entertainment

6.9

Overall

7.6

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

FRA - DFW

I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.

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 12 daily inbound flights from London from 5 different airlines.

  • How long is the flight from London to Philadelphia?

    United Airlines, JetBlue, and Delta can get you from London to Philadelphia in just under 14h 11m. Your travel time can differ by up to 11h 06m. 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, Iberia ($559), American Airlines ($592), and British Airways ($619) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 24% 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 American Airlines ($481), British Airways ($485), and Aer Lingus ($491).

  • 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 (78%), Iberia (75%), Finnair (74%).

  • What are the cheapest flights from London to Philadelphia?

    While on average a flight from London to Philadelphia is generally $1,237, our data shows the cheapest flight currently is $440. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $546 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 Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
Vineland
King of Prussia
Pottstown
Reading
Ocean City
Dewey Beach
Ephrata
Camden
Cherry Hill
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace
Plymouth Meeting

Browse thousands of different options on Cheapflights for your next trip

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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 October 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$559Average$826FlexibilityNo cancel feeOn-time77%
American AirlinesCheapest$592Average$831FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$619Average$784FlexibilityNo cancel feeOn-time70%
FinnairCheapest$642Average$767FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$670Average$1,223FlexibilityNo cancel feeOn-timeN/A

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