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$456+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
LON — PHL
Aug 11 — Aug 181
Tue 8/11
Tue 8/18
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 September or January, booked 20 days in advance, depart on a Monday or Wednesday 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 July 12, 2026.

This KAYAK deal was found by Cheapflights users on 7/7. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/98:40 am
LHR
-
PHL
1 stop14h 24m
JetBlue
Fri 9/116:48 pm
PHL
-
LHR
1 stop30h 42m
JetBlue
Deal found 7/7$816
This Kiwi.com deal was found by Cheapflights users on 7/7. 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.
Sat 10/179:00 am
LTN
-
PHL
2 stops13h 59m
Multiple Airlines
Mon 10/266:30 pm
PHL
-
LTN
1 stop12h 15m
Multiple Airlines
Deal found 7/7$817
This Kiwi.com deal was found by Cheapflights users on 7/7. 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.
Tue 8/112:00 pm
LGW
-
PHL
1 stop15h 37m
Multiple Airlines
Tue 8/189:16 pm
PHL
-
LGW
1 stop31h 44m
Multiple Airlines
Deal found 7/7$817
This Air Canada deal was found by Cheapflights users on 7/8. 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 11/136:00 am
LHR
-
PHL
2 stops21h 56m
Air Canada
Mon 11/309:15 am
PHL
-
LHR
2 stops16h 15m
Air Canada
Deal found 7/8$818
This United Airlines deal was found by Cheapflights users on 7/7. 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 10/157:30 am
LHR
-
PHL
1 stop13h 35m
United Airlines
Sun 10/1810:40 am
PHL
-
LHR
2 stops29h 55m
United Airlines
Deal found 7/7$819
This TravelUp deal was found by Cheapflights users on 7/9. 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 9/216:50 am
LHR
-
PHL
2 stops13h 51m
Air Canada
Wed 9/303:25 pm
PHL
-
LHR
1 stop13h 35m
Air Canada
Deal found 7/9$820
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Tue 8/116:30 am
STN
-
PHL
1 stop17h 25m
Multiple Airlines
Tue 8/188:25 pm
PHL
-
STN
1 stop16h 10m
Multiple Airlines
Deal found 7/8$821
This Cheapflightsfares deal was found by Cheapflights users on 7/8. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:40 am
LHR
-
PHL
1 stop16h 21m
JetBlue
Mon 8/319:12 am
PHL
-
LHR
1 stop16h 18m
JetBlue
Deal found 7/8$821
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Sat 11/76:45 am
LGW
-
PHL
1 stop15h 55m
Multiple Airlines
Mon 11/165:57 pm
PHL
-
LGW
1 stop31h 03m
Multiple Airlines
Deal found 7/8$821
This Mytrip deal was found by Cheapflights users on 7/7. 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 9/287:05 am
STN
-
PHL
2 stops16h 50m
Multiple Airlines
Mon 10/128:25 pm
PHL
-
STN
1 stop18h 00m
Multiple Airlines
Deal found 7/7$822
This Mytrip deal was found by Cheapflights users on 7/8. 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 8/296:15 pm
LTN
-
PHL
2 stops26h 50m
Multiple Airlines
Mon 9/73:25 pm
PHL
-
LTN
2 stops17h 55m
Multiple Airlines
Deal found 7/8$822
This Mytrip deal was found by Cheapflights users on 7/7. 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 8/3110:00 am
LGW
-
PHL
3 stops35h 05m
Multiple Airlines
Tue 9/83:25 pm
PHL
-
LGW
3 stops19h 55m
Multiple Airlines
Deal found 7/7$822

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 July 12, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$816
(United Airlines)

One-way from

$456
(JetBlue)

Popular in

July

Cheapest in

September

Average price

$1,006

Good round-trip deal

$843 or less

Good one-way deal

$626 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. 10% potential increase in price ($94 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 12, 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 10/5

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Mon 10/12

3:08 pm-6:55 am

1 stop10h 47m

$836

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Mon 8/31

6:20 am-4:10 pm

1 stop14h 50m

Philadelphia

Tue 9/8

10:15 pm-10:20 am

Nonstop7h 05m

$843

LondonPhiladelphia

LHR - PHL

LHRPHL

London Heathrow

Tue 9/29

9:30 am-4:05 pm

1 stop11h 35m

Philadelphia

Sun 10/4

7:30 pm-6:55 am

1 stop30h 25m

$844

LondonPhiladelphia

LGW - PHL

LGWPHL

London Gatwick

Mon 8/10

2:00 pm-8:52 am

1 stop23h 52m

Philadelphia

Mon 8/17

6:49 pm-10:00 am

1 stop34h 11m

$860

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Sun 8/23

8:30 am-6:55 pm

1 stop15h 25m

Philadelphia

Sun 8/30

9:12 am-7:50 am

2 stops17h 38m

$880

LondonPhiladelphia

LCY - PHL

LCYPHL

London City

Wed 9/30

9:15 am-9:32 pm

2 stops17h 17m

Philadelphia

Wed 10/28

3:20 pm-9:15 am

2 stops13h 55m

$885

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Thu 9/3

9:40 pm-9:34 pm

3 stops28h 54m

Philadelphia

Tue 9/15

10:50 am-1:25 pm

2 stops21h 35m

$887

LondonPhiladelphia

LTN - PHL

LTNPHL

London Luton

Tue 8/25

1:40 pm-4:05 pm

3 stops31h 25m

Philadelphia

Tue 9/1

3:25 pm-11:45 pm

3 stops27h 20m

$889

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Mon 8/31

10:45 pm-6:04 pm

2 stops24h 19m

Philadelphia

Tue 9/8

3:29 pm-9:20 pm

2 stops24h 51m

$891

LondonPhiladelphia

STN - PHL

STNPHL

London Stansted

Thu 9/3

6:00 am-9:34 pm

3 stops20h 34m

Philadelphia

Tue 9/15

10:50 am-9:20 pm

2 stops29h 30m

$892

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/11

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 July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 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

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 $330). Flying from London to Philadelphia in June is currently the most expensive (average of $1,611). 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 July 12, 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 July 12, 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?

How often are flights from London to Philadelphia delayed?

About 18% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 172 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 Thursday 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, American Airlines have had the lowest number of delays on this route, with just 17% of flights being delayed.

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

The best time to book flights from London to Philadelphia is 11 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.

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 July 12, 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
1,658 reviews

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Overall

7.3

Crew

8.1

Food

6.7

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
1,658 reviews
Aer Lingus
7.3
Good
1,658 reviews

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Overall

7.3

Crew

8.1

Food

6.7

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
11,804 reviews
Aer Lingus
7.3
Good
1,658 reviews

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Overall

7.3

Crew

8.1

Food

6.7

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
3,251 reviews
Aer Lingus
7.3
Good
1,658 reviews

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Overall

7.3

Crew

8.1

Food

6.7

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
8,102 reviews
Aer Lingus
7.3
Good
1,658 reviews

Boarding

7.4

Comfort

7.2

Entertainment

7.0

Overall

7.3

Crew

8.1

Food

6.7

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?

    United Airlines, Iberia, and Air Canada can get you from London to Philadelphia in just under 11h 35m. Your travel time can differ by up to 10h 21m. 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, American Airlines ($610), British Airways ($614), and Aer Lingus ($674) offers the cheapest pricing from London to Philadelphia. You may be able to fly from London to Philadelphia for 27% 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 JetBlue ($452), Aer Lingus ($483), 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 (88%), American Airlines (81%), Finnair (81%).

  • What are the cheapest flights from London to Philadelphia?

    While on average a flight from London to Philadelphia is generally $3,764, our data shows the cheapest flight currently is $505. When looking at the most popular route, (London Heathrow - Philadelphia), you can expect to pay $600 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 $330). Flying from London to Philadelphia in June is currently the most expensive (average of $1,611). 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
Cherry Hill
Lewes
Plymouth Meeting
Wyomissing
Dewey Beach
Wildwood Crest
Pottstown
Ephrata
Milford
Dover
Elkton
Essington
Willow Grove
New Castle
Millville

Browse thousands of different options on Cheapflights for your next trip

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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 July 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$610Average$814FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$614Average$779FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$674Average$1,158FlexibilityNo cancel feeOn-timeN/A

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