Cheap flights from London Heathrow Airport to Philadelphia from £398
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 17/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
19 Jun — 26 Jun1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in September or February, booked 12 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday
Cheap flight deals from Heathrow to Philadelphia
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Cheapest flights from Heathrow to Philadelphia
Explore the most affordable flight options available from Heathrow to Philadelphia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 May 2026.
Sat 26/907:30
LHR
-
PHL
2 stops18h 59m
United Airlines
Tue 29/907:00
PHL
-
LHR
2 stops33h 00m
United Airlines
Deal found 17/5£612
Fri 19/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Tue 30/608:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 18/5£613
Wed 7/1006:50
LHR
-
PHL
2 stops14h 15m
Brussels Airlines
Wed 21/1010:35
PHL
-
LHR
2 stops29h 25m
Brussels Airlines
Deal found 15/5£614
Wed 14/1008:40
LHR
-
PHL
2 stops17h 52m
Air Canada
Mon 19/1015:25
PHL
-
LHR
2 stops13h 10m
Air Canada
Deal found 15/5£615
Thu 10/906:00
LHR
-
PHL
2 stops16h 54m
SWISS
Thu 24/907:00
PHL
-
LHR
2 stops18h 30m
SWISS
Deal found 17/5£615
Mon 23/1111:10
LHR
-
PHL
2 stops16h 46m
Air Canada
Mon 30/1116:35
PHL
-
LHR
2 stops33h 35m
Air Canada
Deal found 16/5£616
Wed 17/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Thu 9/720:55
PHL
-
LHR
1 stop28h 35m
JetBlue
Deal found 18/5£618
Wed 2/909:30
LHR
-
PHL
2 stops18h 16m
Air Canada
Tue 22/915:25
PHL
-
LHR
2 stops15h 25m
Air Canada
Deal found 17/5£618
Thu 9/708:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Fri 24/708:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 17/5£619
Wed 17/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Wed 29/708:28
PHL
-
LHR
1 stop17h 02m
JetBlue
Deal found 17/5£620
Thu 4/608:40
LHR
-
PHL
1 stop15h 12m
JetBlue
Wed 10/609:26
PHL
-
LHR
1 stop16h 04m
JetBlue
Deal found 16/5£621
Mon 7/907:30
LHR
-
PHL
1 stop13h 35m
United Airlines
Wed 16/913:35
PHL
-
LHR
1 stop12h 10m
United Airlines
Deal found 17/5£621
Best flights from Heathrow to Philadelphia
Discover carefully curated flight deals from Heathrow to Philadelphia that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 20 May 2026.
Fri 25/912:40
LHR
-
PHL
2 stops32h 01m
Air Canada
Tue 29/915:25
PHL
-
LHR
1 stop10h 05m
Air Canada
Deal found 19/5£637
Tue 30/609:30
LHR
-
PHL
2 stops18h 14m
United Airlines
Tue 7/710:32
PHL
-
LHR
1 stop19h 08m
United Airlines
Deal found 16/5£657
Thu 10/909:15
LHR
-
PHL
Nonstop8h 00m
Finnair
Thu 24/919:35
PHL
-
LHR
Nonstop7h 15m
Finnair
Deal found 16/5£675
Fri 25/907:00
LHR
-
PHL
1 stop11h 45m
British Airways
Tue 29/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 17/5£683
Tue 27/1006:30
LHR
-
PHL
2 stops16h 54m
Delta
Fri 30/1017:15
PHL
-
LHR
2 stops12h 05m
Delta
Deal found 15/5£718
Mon 29/607:30
LHR
-
PHL
2 stops21h 14m
United Airlines
Mon 6/710:32
PHL
-
LHR
2 stops14h 23m
United Airlines
Deal found 15/5£661
Fri 12/609:15
LHR
-
PHL
Nonstop7h 55m
Finnair
Thu 18/622:10
PHL
-
LHR
Nonstop7h 10m
Finnair
Deal found 15/5£712
Thu 3/912:30
LHR
-
PHL
Nonstop8h 00m
British Airways
Fri 18/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 17/5£721
Thu 25/606:50
LHR
-
PHL
2 stops17h 04m
United Airlines
Mon 29/613:31
PHL
-
LHR
2 stops14h 04m
United Airlines
Deal found 15/5£698
Direct flights from Heathrow to Philadelphia
Explore direct flight options from Heathrow to Philadelphia based on user searches, and compare prices and availability for your desired travel dates. Data last updated 20 May 2026.
Wed 9/909:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Wed 23/919:35
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 17/5£622
Wed 7/1013:00
LHR
-
PHL
Nonstop8h 00m
British Airways
Wed 21/1018:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 15/5£629
Wed 16/913:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Wed 23/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 19/5£630
Wed 9/913:45
LHR
-
PHL
Nonstop7h 55m
Finnair
Thu 24/918:45
PHL
-
LHR
Nonstop7h 05m
Finnair
Deal found 17/5£636
Mon 19/1013:00
LHR
-
PHL
Nonstop8h 00m
British Airways
Thu 22/1018:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 18/5£636
Sat 26/909:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Tue 29/919:35
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 17/5£642
Tue 15/913:00
LHR
-
PHL
Nonstop8h 00m
British Airways
Sun 27/922:20
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 16/5£643
Wed 7/1009:15
LHR
-
PHL
Nonstop8h 00m
Finnair
Wed 21/1018:45
PHL
-
LHR
Nonstop7h 05m
Finnair
Deal found 18/5£644
Tue 15/909:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Wed 30/918:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 17/5£645
Thu 25/609:15
LHR
-
PHL
Nonstop7h 55m
Finnair
Thu 2/718:50
PHL
-
LHR
Nonstop7h 00m
Finnair
Deal found 18/5£650
Sat 6/613:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Thu 11/618:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 19/5£656
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 20 May 2026 and is based on user searches.
Sun 24/508:40
LHR
-
PHL
1 stop28h 51m
JetBlue
Fri 5/619:47
PHL
-
LHR
1 stop29h 43m
JetBlue
Deal found 15/5£711
Tue 26/521:25
LHR
-
PHL
2 stops40h 06m
Icelandair
Tue 2/609:21
PHL
-
LHR
2 stops21h 34m
Icelandair
Deal found 15/5£709
Wed 27/513:05
LHR
-
PHL
2 stops24h 26m
Icelandair
Wed 3/619:47
PHL
-
LHR
2 stops43h 33m
Icelandair
Deal found 15/5£649
Wed 27/508:40
LHR
-
PHL
1 stop28h 51m
JetBlue
Thu 4/609:21
PHL
-
LHR
1 stop16h 09m
JetBlue
Deal found 15/5£661
Wed 27/508:40
LHR
-
PHL
1 stop28h 51m
JetBlue
Fri 5/609:21
PHL
-
LHR
1 stop16h 09m
JetBlue
Deal found 15/5£671
Wed 27/513:05
LHR
-
PHL
2 stops24h 26m
Icelandair
Fri 5/619:47
PHL
-
LHR
2 stops35h 08m
Icelandair
Deal found 15/5£694
Wed 27/513:05
LHR
-
PHL
2 stops24h 26m
Icelandair
Tue 2/609:21
PHL
-
LHR
2 stops21h 34m
Icelandair
Deal found 15/5£708
Thu 28/508:40
LHR
-
PHL
1 stop28h 51m
JetBlue
Sat 6/609:26
PHL
-
LHR
1 stop16h 04m
JetBlue
Deal found 17/5£716
One-way flights from Heathrow to Philadelphia
Search for one-way flight options from Heathrow to Philadelphia. Find affordable one-way fares based on user searches. Data last updated 20 May 2026.
Mon 17/808:05
LHR
-
PHL
2 stops39h 50m
Multiple Airlines
Deal found 19/5£398
Mon 15/620:50
LHR
-
PHL
3 stops31h 27m
Multiple Airlines
Deal found 19/5£404
Tue 16/615:10
LHR
-
PHL
3 stops53h 27m
Multiple Airlines
Deal found 19/5£410
Tue 18/819:25
LHR
-
PHL
2 stops28h 30m
Multiple Airlines
Deal found 19/5£413
Mon 6/707:30
LHR
-
PHL
1 stop13h 35m
Lufthansa
Deal found 19/5£418
Tue 13/1006:00
LHR
-
PHL
2 stops16h 54m
SWISS
Deal found 19/5£420
Mon 13/713:25
LHR
-
PHL
1 stop10h 30m
Aer Lingus
Deal found 19/5£423
Sat 20/608:40
LHR
-
PHL
1 stop27h 58m
JetBlue
Deal found 19/5£424
Sat 15/817:00
LHR
-
PHL
3 stops30h 55m
Multiple Airlines
Deal found 19/5£428
Wed 10/620:50
LHR
-
PHL
3 stops31h 27m
Multiple Airlines
Deal found 19/5£430
Tue 16/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Deal found 19/5£434
Fri 12/608:40
LHR
-
PHL
1 stop16h 20m
JetBlue
Deal found 19/5£436
Find flight deals from Heathrow to Philadelphia
Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) 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 20 May 2026.
Customise your flight search to find flights from Heathrow 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 858,174 searches. Data last updated 20 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 25/9
12:40-15:41
2 stops32h 01m
Philadelphia
Tue 29/9
15:25-06:30
1 stop10h 05m
£637
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Tue 30/6
09:30-22:44
2 stops18h 14m
Philadelphia
Tue 7/7
10:32-10:40
1 stop19h 08m
£657
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 29/6
07:30-23:44
2 stops21h 14m
Philadelphia
Mon 6/7
10:32-05:55
2 stops14h 23m
£661
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 10/9
09:15-12:15
Nonstop8h 00m
Philadelphia
Thu 24/9
19:35-07:50
Nonstop7h 15m
£675
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 25/9
07:00-13:45
1 stop11h 45m
Philadelphia
Tue 29/9
18:45-06:50
Nonstop7h 05m
£683
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 25/6
06:50-18:54
2 stops17h 04m
Philadelphia
Mon 29/6
13:31-08:35
2 stops14h 04m
£698
Fastest return journey
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 12/6
09:15-12:10
Nonstop7h 55m
Philadelphia
Thu 18/6
22:10-10:20
Nonstop7h 10m
£712
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Tue 27/10
06:30-19:24
2 stops16h 54m
Philadelphia
Fri 30/10
17:15-09:20
2 stops12h 05m
£718
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 3/9
12:30-15:30
Nonstop8h 00m
Philadelphia
Fri 18/9
18:45-06:50
Nonstop7h 05m
£721
Cheapest one-way
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 6/7
07:30-16:05
1 stop13h 35m
£418
Flights are sorted by cheapest return flights first.
Deals found on 19/5
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
Best time to book a flight from Heathrow to Philadelphia
Have a flexible travel schedule? Discover the best time to fly to Philadelphia from Heathrow with our price prediction graph.
LHR-PHL
Estimated return 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 Heathrow Airport to Philadelphia
Prices
Airlines
Delays
More
How far ahead should I book a flight from London Heathrow Airport to Philadelphia?
To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 11 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from London Heathrow Airport to Philadelphia?
Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £504). Flying from London Heathrow Airport to Philadelphia in December is currently the most expensive (average of £678). 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 LHR to PHL?
Find hourly flight availability from Heathrow 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 20 May 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Philadelphia as you normally would.
How much does it cost for a return flight from London Heathrow Airport to Philadelphia?
Weekly flight availability from London Heathrow Airport to Philadelphia
Explore weekly flight availability from Heathrow 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 20 May 2026.
The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (10 on average).
How often are flights from London to Philadelphia delayed?
About 19% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 170 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 past year, American Airlines have had the lowest number of delays on this route, with just 19% of flights being delayed.
What’s the top stopover airport for flights from London Heathrow Airport to Philadelphia?
Share of one-stop return flights from London Heathrow Airport to Philadelphia chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Dublin (DUB) – chosen by Cheapflights users on 51% of one-stop itineraries from London Heathrow Airport to Philadelphia on Cheapflights.
What’s the cheapest stopover airport for flights from London Heathrow Airport to Philadelphia?
Average return fare for one-stop flights from London Heathrow Airport to Philadelphia, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Washington, D.C. (IAD) is the most affordable one-stop option, with an average return flight price of £537.
What’s the fastest stopover option from London Heathrow Airport to Philadelphia?
Shortest average travel time for one-stop one-way flights from London Heathrow Airport to Philadelphia, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Montreal (YUL) have the shortest average one-way travel time for one-stop routes: 10h 08m.
Which airport typically offers the quickest stopover for flights from London Heathrow Airport to Philadelphia?
Average stopover duration for one-stop one-way flights from London Heathrow Airport to Philadelphia, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Montreal (YUL) offer the fastest connection on this route, with an average stopover time of 1h 49m.
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 20 May 2026.
Get a feel of what it's like to fly with Finnair,Aer Lingus, andAmerican Airlines from London Heathrow Airport 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.
It’s a small plane with minimal service and luggage space
Related info for your journey
Find useful and relevant information for your journey from Heathrow 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 Heathrow?
Most people fly into Philadelphia (PHL) if they book a flight to Philadelphia from London Heathrow. On average, Philadelphia has 12 inbound flights from London Heathrow per day from 9 airlines. Philadelphia is conveniently located just 7.0 mi from Philadelphia’s city center.
How long is the flight from London Heathrow Airport to Philadelphia?
Airlines like Air Canada, United Airlines, and Finnair fly from London Heathrow Airport to Philadelphia in about 8h. The time it takes to get you to your destination can typically vary by up to 24h 01m. The distance between London Heathrow Airport and Philadelphia is about 3533 mi. This flight may include one or multiple stops.
What are the cheapest airlines flying from London Heathrow Airport to Philadelphia round-trip?
Our cheapest airline available from London Heathrow Airport to Philadelphia is Lufthansa. Our recent data shows that you can find tickets from as low as £388 on this airline. Additional options worth looking into are JetBlue and United Airlines, starting at £419 and £433 round-trip. Lufthansa is currently priced 34% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from London Heathrow Airport to Philadelphia one-way?
The cheapest airline one-way is JetBlue, with whom users have recently found tickets for as low as £324. However, be on the lookout for offers from Aer Lingus and British Airways, as they are both options that can get you from London Heathrow Airport to Philadelphia for a low price.
What are the most reliable airlines from London Heathrow Airport to Philadelphia?
Consider Malaysia Airlines (85%), American Airlines (79%) or Finnair (79%) when booking your flight. These represent the most reliable airlines when flying from London Heathrow Airport to Philadelphia.
What are the cheapest flights from London Heathrow Airport to Philadelphia?
The cheapest flight price from London Heathrow Airport to Philadelphia is £418. On average you can expect to pay £1,086. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £518.
Can I find deals for business class flights from Heathrow to Philadelphia?
Yes. Cheapflights offers flight deals from Heathrow 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 Heathrow Airport to Philadelphia?
Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £504). Flying from London Heathrow Airport to Philadelphia in December is currently the most expensive (average of £678). 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.
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.
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Alternative routes
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Philadelphia flight routes
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Fly from Heathrow to Philadelphia on these airlines
Choose from the following airlines for your flight from Heathrow to Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on 20 May 2026.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 20 May 2026.
Top 9 airlines flying from Heathrow to Philadelphia
Discover the top 9 airlines that operate flights from Heathrow 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 858,174 searches. Data last updated 20 May 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Heathrow to Philadelphia?
When you search for this flight from Heathrow to Philadelphia, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Heathrow to Philadelphia?
Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Philadelphia for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Heathrow to Philadelphia with no change fees?
Need flexible booking options for your flight to Philadelphia from Heathrow? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from Heathrow to Philadelphia become cheaper?
Yes! Start tracking prices for Heathrow to Philadelphia flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.
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