Cheap flights from London Heathrow Airport to Philadelphia from £356
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 27/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
1 Oct — 8 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or November, booked 12 days in advance, depart on a Tuesday or Monday 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 September 2026.
Fri 25/907:30 -
2 stops18h 59m
Fri 2/1015:25 -
1 stop13h 35m
Deal found 28/8£601
Sat 10/1006:50 -
2 stops13h 51m
Sat 17/1015:25 -
2 stops15h 25m
Deal found 1/9£602
Tue 8/907:50 -
1 stop14h 50m
Thu 24/919:35 -
Nonstop7h 15m
Deal found 1/9£602
Mon 14/906:55 -
2 stops14h 10m
Mon 21/917:40 -
1 stop12h 00m
Deal found 30/8£603
Fri 18/909:15 -
Nonstop7h 55m
Sun 20/917:49 -
1 stop12h 01m
Deal found 31/8£604
Sat 19/909:15 -
Nonstop7h 55m
Sun 20/919:35 -
Nonstop7h 15m
Deal found 1/9£605
Wed 14/1008:00 -
2 stops20h 30m
Wed 21/1019:30 -
1 stop10h 10m
Deal found 31/8£605
Mon 14/914:05 -
1 stop29h 42m
Mon 21/910:50 -
1 stop14h 45m
Deal found 28/8£606
Fri 16/1007:25 -
2 stops16h 59m
Mon 19/1015:08 -
1 stop14h 32m
Deal found 29/8£607
Mon 14/1210:25 -
1 stop28h 32m
Wed 13/110:15 -
2 stops17h 10m
Deal found 28/8£608
Wed 28/1010:25 -
1 stop15h 15m
Thu 7/110:15 -
2 stops16h 40m
Deal found 27/8£608
Wed 30/909:30 -
1 stop10h 17m
Wed 28/1010:30 -
2 stops16h 00m
Deal found 31/8£609
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 September 2026.
Thu 19/1108:50 -
1 stop12h 20m
Mon 30/1118:35 -
Nonstop7h 00m
Deal found 30/8£613
Thu 17/914:05 -
1 stop12h 27m
Fri 25/915:08 -
1 stop10h 47m
Deal found 29/8£620
Mon 14/909:55 -
2 stops17h 26m
Mon 21/913:24 -
1 stop12h 21m
Deal found 30/8£623
Wed 11/1107:05 -
3 stops22h 50m
Wed 18/1114:12 -
2 stops20h 48m
Deal found 30/8£633
Sun 13/1212:25 -
2 stops25h 14m
Fri 1/109:29 -
2 stops22h 11m
Deal found 31/8£684
Wed 11/1110:35 -
Nonstop8h 05m
Wed 18/1118:35 -
Nonstop7h 00m
Deal found 30/8£618
Wed 16/912:15 -
1 stop11h 39m
Fri 25/915:08 -
1 stop10h 47m
Deal found 29/8£622
Fri 25/914:10 -
2 stops14h 20m
Fri 2/1010:40 -
2 stops14h 15m
Deal found 28/8£628
Thu 5/1119:55 -
2 stops31h 41m
Sun 8/1118:30 -
3 stops18h 00m
Deal found 27/8£698
Thu 17/1216:20 -
1 stop26h 53m
Tue 5/120:00 -
2 stops20h 20m
Deal found 27/8£633
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 September 2026.
Wed 30/913:00 -
Nonstop8h 00m
Wed 28/1020:25 -
Nonstop7h 25m
Deal found 1/9£602
Wed 30/913:45 -
Nonstop7h 55m
Wed 28/1020:25 -
Nonstop7h 25m
Deal found 30/8£603
Fri 18/909:15 -
Nonstop7h 55m
Sun 20/922:10 -
Nonstop7h 10m
Deal found 31/8£604
Mon 18/110:35 -
Nonstop8h 15m
Mon 1/219:50 -
Nonstop7h 00m
Deal found 27/8£605
Fri 18/913:00 -
Nonstop8h 00m
Fri 25/919:35 -
Nonstop7h 15m
Deal found 29/8£605
Mon 14/909:15 -
Nonstop7h 55m
Sun 27/918:45 -
Nonstop7h 05m
Deal found 30/8£612
Mon 19/1009:15 -
Nonstop7h 55m
Tue 27/1020:25 -
Nonstop7h 25m
Deal found 1/9£613
Mon 14/913:00 -
Nonstop8h 00m
Mon 21/919:35 -
Nonstop7h 15m
Deal found 31/8£613
Mon 14/913:00 -
Nonstop8h 00m
Mon 28/919:35 -
Nonstop7h 15m
Deal found 29/8£614
Wed 7/1013:45 -
Nonstop7h 55m
Wed 21/1022:10 -
Nonstop7h 10m
Deal found 28/8£615
Fri 9/1013:45 -
Nonstop7h 55m
Mon 12/1018:45 -
Nonstop7h 05m
Deal found 28/8£616
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 1 September 2026 and is based on user searches.
Tue 8/907:50 -
1 stop14h 50m
Thu 24/919:35 -
Nonstop7h 15m
Deal found 1/9£602
Mon 14/906:55 -
2 stops14h 10m
Mon 21/917:40 -
1 stop12h 00m
Deal found 30/8£603
Mon 14/914:05 -
1 stop29h 42m
Mon 21/910:50 -
1 stop14h 45m
Deal found 28/8£606
Tue 15/906:50 -
2 stops13h 51m
Wed 30/910:05 -
2 stops15h 30m
Deal found 31/8£608
Fri 18/909:15 -
Nonstop7h 55m
Sun 20/922:10 -
Nonstop7h 10m
Deal found 31/8£604
Sat 19/909:15 -
Nonstop7h 55m
Sun 20/917:49 -
1 stop13h 26m
Deal found 1/9£605
Fri 25/907:30 -
2 stops18h 59m
Fri 2/1015:25 -
1 stop13h 35m
Deal found 28/8£601
Wed 30/909:30 -
1 stop10h 17m
Wed 28/1010:30 -
2 stops16h 00m
Deal found 31/8£609
Sat 10/1006:50 -
2 stops13h 51m
Sat 17/1015:25 -
2 stops15h 25m
Deal found 1/9£602
Wed 14/1008:00 -
2 stops20h 30m
Wed 21/1019:30 -
1 stop10h 10m
Deal found 31/8£605
Fri 16/1007:25 -
2 stops16h 59m
Mon 19/1015:08 -
1 stop14h 32m
Deal found 29/8£607
Wed 28/1010:25 -
1 stop15h 15m
Thu 7/110:15 -
2 stops16h 40m
Deal found 27/8£608
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 September 2026.
Tue 27/1020:50 -
3 stops54h 53m
Deal found 30/8£356
Mon 9/1112:15 -
3 stops35h 04m
Deal found 30/8£360
Sat 28/1120:50 -
3 stops48h 20m
Deal found 30/8£361
Mon 26/1018:50 -
3 stops50h 20m
Deal found 30/8£362
Tue 3/1112:15 -
3 stops40h 01m
Deal found 31/8£363
Sun 1/1120:35 -
3 stops50h 44m
Deal found 31/8£365
Sat 7/1111:05 -
2 stops34h 05m
Deal found 31/8£366
Mon 23/1120:50 -
3 stops48h 20m
Deal found 27/8£367
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 September 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 7,457,451 searches. Data last updated 1 September 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 London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 19/11
08:50-16:10
1 stop12h 20m
Philadelphia
Mon 30/11
18:35-06:35
Nonstop7h 00m
£613
Fastest return journey
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Wed 11/11
10:35-13:40
Nonstop8h 05m
Philadelphia
Wed 18/11
18:35-06:35
Nonstop7h 00m
£618
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 17/9
14:05-21:32
1 stop12h 27m
Philadelphia
Fri 25/9
15:08-06:55
1 stop10h 47m
£620
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Wed 16/9
12:15-18:54
1 stop11h 39m
Philadelphia
Fri 25/9
15:08-06:55
1 stop10h 47m
£622
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Mon 14/9
09:55-22:21
2 stops17h 26m
Philadelphia
Mon 21/9
13:24-06:45
1 stop12h 21m
£623
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Fri 25/9
14:10-23:30
2 stops14h 20m
Philadelphia
Fri 2/10
10:40-05:55
2 stops14h 15m
£628
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Wed 11/11
07:05-00:55
3 stops22h 50m
Philadelphia
Wed 18/11
14:12-16:00
2 stops20h 48m
£633
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 17/12
16:20-14:13
1 stop26h 53m
Philadelphia
Tue 5/1
20:00-21:20
2 stops20h 20m
£633
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Sun 13/12
12:25-08:39
2 stops25h 14m
Philadelphia
Fri 1/1
09:29-12:40
2 stops22h 11m
£684
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 5/11
19:55-22:36
2 stops31h 41m
Philadelphia
Sun 8/11
18:30-17:30
3 stops18h 00m
£698
Flights are sorted by cheapest return flights first.
Deals found on 1/9
Showing 1-10 of 19 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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £556). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £853). 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 September 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?
Airfare is typical for this route at the moment.
London Heathrow Airport to Philadelphia flights typically cost between £531 and £678 in September.The cheapest return price found within the last 5 days was £601 on British Airways (14 Sept–21 Sept).
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 September 2026.
The most flights from LHR 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 often are flights from London to Philadelphia delayed?
About 16% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 154 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 past year, American Airlines have had the lowest number of delays on this route, with just 14% 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 70% 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.
Montreal (YUL) is the most affordable one-stop option, with an average return flight price of £503.
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 2h 13m.
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 September 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.
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 15 inbound flights from London Heathrow per day from 7 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 British Airways, United Airlines, and Delta fly from London Heathrow Airport to Philadelphia in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 5h 06m. 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 JetBlue. Our recent data shows that you can find tickets from as low as £415 on this airline. Additional options worth looking into are Finnair and Aer Lingus, starting at £450 and £459 round-trip. JetBlue is currently priced 37% 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 Aer Lingus, with whom users have recently found tickets for as low as £346. However, be on the lookout for offers from British Airways and Finnair, 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 (89%), American Airlines (83%) or Finnair (83%) 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 £415. On average you can expect to pay £1,537. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £498.
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, March is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £556). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £853). 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.
Book flights to Philadelphia if you plan to visit one of these locations
King of Prussia
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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 September 2026.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 1 September 2026.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 1 September 2026.
Top 7 airlines flying from Heathrow to Philadelphia
Discover the top 7 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 7,457,451 searches. Data last updated 1 September 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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