Cheap flights from London Heathrow Airport to Philadelphia from £287
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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
31 Mar — 7 Apr1
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 April, booked 11 days in advance, depart on a Wednesday or Tuesday 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 1 March 2026.
Tue 21/408:40
LHR
-
PHL
1 stop27h 55m
JetBlue
Tue 28/406:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 28/2£451
Mon 11/508:40
LHR
-
PHL
1 stop27h 55m
JetBlue
Mon 18/506:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 24/2£460
Tue 6/1008:40
LHR
-
PHL
1 stop13h 35m
JetBlue
Tue 13/1010:20
PHL
-
LHR
1 stop15h 10m
JetBlue
Deal found 28/2£460
Tue 14/408:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Thu 7/508:25
PHL
-
LHR
1 stop17h 05m
JetBlue
Deal found 28/2£464
Wed 11/309:20
LHR
-
PHL
1 stop17h 16m
JetBlue
Mon 23/320:20
PHL
-
LHR
1 stop30h 35m
JetBlue
Deal found 26/2£465
Mon 14/908:40
LHR
-
PHL
1 stop18h 10m
JetBlue
Mon 28/910:20
PHL
-
LHR
1 stop15h 10m
JetBlue
Deal found 25/2£467
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 1 March 2026.
Wed 15/414:10
LHR
-
PHL
2 stops30h 34m
United Airlines
Wed 22/411:36
PHL
-
LHR
2 stops14h 19m
United Airlines
Deal found 27/2£515
Mon 13/409:55
LHR
-
PHL
2 stops17h 17m
Delta
Mon 20/417:32
PHL
-
LHR
2 stops14h 33m
Delta
Deal found 27/2£568
Wed 15/408:00
LHR
-
PHL
2 stops28h 35m
TAP AIR PORTUGAL
Wed 22/418:33
PHL
-
LHR
3 stops18h 12m
TAP AIR PORTUGAL
Deal found 27/2£591
Thu 7/509:15
LHR
-
PHL
Nonstop7h 55m
British Airways
Sun 10/522:05
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 24/2£618
Thu 23/410:50
LHR
-
PHL
2 stops18h 55m
United Airlines
Sun 26/409:15
PHL
-
LHR
2 stops30h 45m
United Airlines
Deal found 24/2£533
Mon 29/607:30
LHR
-
PHL
1 stop13h 35m
United Airlines
Mon 13/715:10
PHL
-
LHR
2 stops14h 15m
United Airlines
Deal found 24/2£565
Thu 25/606:20
LHR
-
PHL
1 stop14h 40m
British Airways
Sun 26/718:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 25/2£631
Mon 23/316:20
LHR
-
PHL
2 stops28h 54m
United Airlines
Mon 27/406:17
PHL
-
LHR
2 stops19h 13m
United Airlines
Deal found 25/2£592
Thu 2/709:15
LHR
-
PHL
Nonstop8h 00m
British Airways
Mon 6/722:20
PHL
-
LHR
Nonstop7h 00m
British Airways
Deal found 28/2£651
Fri 3/408:00
LHR
-
PHL
2 stops15h 54m
United Airlines
Tue 7/410:33
PHL
-
LHR
2 stops14h 22m
United Airlines
Deal found 24/2£622
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 1 March 2026.
Mon 13/409:15
LHR
-
PHL
Nonstop7h 55m
Finnair
Mon 20/418:45
PHL
-
LHR
Nonstop7h 05m
Finnair
Deal found 26/2£531
Sat 9/513:45
LHR
-
PHL
Nonstop7h 55m
British Airways
Sat 30/518:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 25/2£535
Wed 22/412:30
LHR
-
PHL
Nonstop8h 00m
British Airways
Mon 27/419:35
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 28/2£538
Mon 13/412:30
LHR
-
PHL
Nonstop8h 00m
British Airways
Mon 20/422:05
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 27/2£541
Tue 14/409:15
LHR
-
PHL
Nonstop7h 55m
British Airways
Thu 7/518:45
PHL
-
LHR
Nonstop7h 05m
British Airways
Deal found 28/2£546
Wed 15/412:30
LHR
-
PHL
Nonstop8h 00m
British Airways
Wed 22/419:35
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 26/2£547
Tue 21/409:15
LHR
-
PHL
Nonstop7h 55m
Finnair
Tue 28/419:35
PHL
-
LHR
Nonstop7h 15m
Finnair
Deal found 28/2£549
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 1 March 2026 and is based on user searches.
Wed 11/309:20
LHR
-
PHL
1 stop17h 16m
JetBlue
Mon 23/320:20
PHL
-
LHR
1 stop30h 35m
JetBlue
Deal found 26/2£465
Wed 11/309:00
LHR
-
PHL
2 stops17h 44m
Air Canada
Mon 23/315:30
PHL
-
LHR
1 stop11h 40m
Air Canada
Deal found 25/2£526
Tue 17/309:00
LHR
-
PHL
2 stops17h 44m
Air Canada
Sat 18/416:25
PHL
-
LHR
2 stops47h 35m
Air Canada
Deal found 25/2£496
Tue 17/308:30
LHR
-
PHL
1 stop12h 35m
Lufthansa
Sat 18/416:25
PHL
-
LHR
2 stops47h 35m
Lufthansa
Deal found 25/2£525
Wed 18/306:30
LHR
-
PHL
2 stops18h 39m
United Airlines
Thu 7/516:20
PHL
-
LHR
2 stops23h 40m
United Airlines
Deal found 27/2£506
Wed 18/306:30
LHR
-
PHL
1 stop12h 25m
British Airways
Thu 16/419:35
PHL
-
LHR
Nonstop7h 15m
British Airways
Deal found 27/2£534
Wed 18/307:50
LHR
-
PHL
1 stop11h 05m
British Airways
Wed 1/422:10
PHL
-
LHR
Nonstop7h 10m
British Airways
Deal found 26/2£535
Tue 24/309:20
LHR
-
PHL
1 stop17h 11m
JetBlue
Tue 31/306:00
PHL
-
LHR
1 stop19h 30m
JetBlue
Deal found 28/2£534
Mon 30/307:40
LHR
-
PHL
1 stop16h 15m
Aer Lingus
Thu 9/420:25
PHL
-
LHR
1 stop18h 00m
Aer Lingus
Deal found 26/2£531
Tue 31/313:00
LHR
-
PHL
2 stops15h 14m
American Airlines
Tue 7/408:36
PHL
-
LHR
1 stop16h 39m
American Airlines
Deal found 26/2£523
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 1 March 2026.
Wed 22/421:10
LHR
-
PHL
3 stops52h 58m
Multiple Airlines
Deal found 25/2£287
Wed 15/408:40
LHR
-
PHL
1 stop27h 55m
JetBlue
Deal found 26/2£313
Mon 27/415:00
LHR
-
PHL
3 stops52h 02m
Multiple Airlines
Deal found 27/2£322
Tue 14/408:40
LHR
-
PHL
1 stop13h 58m
JetBlue
Deal found 28/2£325
Tue 12/508:40
LHR
-
PHL
1 stop18h 00m
JetBlue
Deal found 27/2£325
Sun 26/409:55
LHR
-
PHL
3 stops57h 07m
Multiple Airlines
Deal found 26/2£329
Sun 12/422:00
LHR
-
PHL
3 stops47h 26m
Multiple Airlines
Deal found 25/2£330
Tue 21/408:45
LHR
-
PHL
2 stops15h 10m
Multiple Airlines
Deal found 25/2£332
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 1 March 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 1 March 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
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 15/4
14:10-15:44
2 stops30h 34m
Philadelphia
Wed 22/4
11:36-06:55
2 stops14h 19m
£515
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 23/4
10:50-00:45
2 stops18h 55m
Philadelphia
Sun 26/4
09:15-21:00
2 stops30h 45m
£533
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 29/6
07:30-16:05
1 stop13h 35m
Philadelphia
Mon 13/7
15:10-10:25
2 stops14h 15m
£565
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/4
09:55-22:12
2 stops17h 17m
Philadelphia
Mon 20/4
17:32-13:05
2 stops14h 33m
£568
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 15/4
08:00-07:35
2 stops28h 35m
Philadelphia
Wed 22/4
18:33-17:45
3 stops18h 12m
£591
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 23/3
16:20-17:14
2 stops28h 54m
Philadelphia
Mon 27/4
06:17-06:30
2 stops19h 13m
£592
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 7/5
09:15-12:10
Nonstop7h 55m
Philadelphia
Sun 10/5
22:05-10:20
Nonstop7h 15m
£618
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 3/4
08:00-18:54
2 stops15h 54m
Philadelphia
Tue 7/4
10:33-05:55
2 stops14h 22m
£622
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 25/6
06:20-16:00
1 stop14h 40m
Philadelphia
Sun 26/7
18:45-06:50
Nonstop7h 05m
£631
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 2/7
09:15-12:15
Nonstop8h 00m
Philadelphia
Mon 6/7
22:20-10:20
Nonstop7h 00m
£651
Flights are sorted by cheapest return flights first.
Deals found on 27/2
Showing 1-10 of 21 resultsSorted by cheapest first
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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?
Use this chart to determine the optimal time to book a return flight from Heathrow to Philadelphia. Price data was last updated on 27 February 2026.
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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £312). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £340). 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 1 March 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.
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 1 March 2026.
The most flights from LHR to PHL are scheduled on a Monday (10 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (10 on average).
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 177 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?
Wednesday tends to have the lowest number of delays on this route, whereas Tuesday 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, British Airways have had the lowest number of delays on this route, with just 17% 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 44% 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 £534.
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: 11h 09m.
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 Washington, D.C. (IAD) offer the fastest connection on this route, with an average stopover time of 1h 52m.
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 1 March 2026.
Get a feel of what it's like to fly with Finnair, United Airlines, andAer Lingus 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.
baggage allowance was different between the outgoing and inbound flights
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 10 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 United Airlines and Delta fly from London Heathrow Airport to Philadelphia in about 17h 17m. The time it takes to get you to your destination can typically vary by up to 13h 17m. 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 United Airlines. Our recent data shows that you can find tickets from as low as £300 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at £336 and £410 round-trip. United Airlines is currently priced 47% 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 £322. However, be on the lookout for offers from British Airways and Iberia, 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 American Airlines (75%), Aer Lingus (75%) or Finnair (75%) 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 £323. On average you can expect to pay £962. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £440.
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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £312). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £340). 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
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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 1 March 2026.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 1 March 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 1 March 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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