Cheap flights from London Heathrow Airport to Philadelphia from £348
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 28/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
16 Sep — 23 Sep1
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 Monday
Cheap flight deals from Heathrow to Philadelphia
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
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 17 August 2026.
Wed 14/1009:30 -
1 stop11h 35m
Thu 22/1006:15 -
2 stops18h 40m
Deal found 12/8£581
Fri 16/1006:40 -
2 stops20h 27m
Sat 24/1014:10 -
2 stops21h 50m
Deal found 12/8£581
Thu 17/913:25 -
1 stop10h 30m
Mon 21/920:25 -
1 stop9h 45m
Deal found 12/8£582
Wed 23/907:30 -
2 stops16h 24m
Sun 4/1016:20 -
2 stops23h 40m
Deal found 13/8£583
Tue 15/907:25 -
2 stops16h 29m
Tue 22/907:00 -
2 stops33h 00m
Deal found 16/8£584
Wed 9/912:00 -
1 stop11h 55m
Wed 16/920:25 -
1 stop9h 45m
Deal found 12/8£584
Thu 17/909:50 -
1 stop14h 05m
Sun 20/920:25 -
1 stop17h 30m
Deal found 13/8£586
Tue 20/1006:40 -
2 stops20h 27m
Thu 29/1009:20 -
2 stops20h 00m
Deal found 14/8£587
Wed 9/1213:30 -
2 stops14h 26m
Mon 14/1209:15 -
2 stops16h 55m
Deal found 13/8£587
Fri 25/912:00 -
1 stop11h 55m
Fri 9/1020:25 -
1 stop12h 05m
Deal found 13/8£588
Mon 14/909:15 -
Nonstop7h 55m
Tue 22/913:39 -
1 stop15h 01m
Deal found 13/8£589
Thu 17/906:40 -
2 stops20h 43m
Mon 21/909:25 -
2 stops27h 15m
Deal found 12/8£589
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 17 August 2026.
Wed 7/1007:05 -
3 stops20h 02m
Wed 14/1009:20 -
2 stops28h 10m
Deal found 16/8£598
Fri 16/1016:00 -
2 stops22h 42m
Sun 18/1007:00 -
1 stop18h 35m
Deal found 14/8£609
Wed 11/1106:30 -
1 stop12h 35m
Wed 18/1119:50 -
Nonstop7h 00m
Deal found 13/8£623
Mon 14/906:30 -
2 stops17h 39m
Mon 21/917:00 -
1 stop11h 15m
Deal found 14/8£663
Thu 10/906:00 -
2 stops21h 03m
Thu 24/906:00 -
2 stops24h 00m
Deal found 14/8£673
Thu 22/1008:40 -
1 stop14h 19m
Mon 2/1115:30 -
1 stop10h 25m
Deal found 15/8£697
Wed 16/1206:00 -
2 stops17h 43m
Sat 16/121:25 -
3 stops39h 05m
Deal found 17/8£717
Thu 22/1019:30 -
2 stops31h 42m
Sat 31/1013:40 -
2 stops28h 00m
Deal found 15/8£630
Fri 18/913:00 -
Nonstop8h 00m
Wed 23/918:45 -
Nonstop7h 05m
Deal found 13/8£686
Wed 30/908:00 -
2 stops30h 31m
Wed 7/1018:48 -
3 stops17h 57m
Deal found 16/8£687
Sun 27/909:15 -
Nonstop7h 55m
Sun 4/1017:30 -
1 stop9h 30m
Deal found 13/8£715
Fri 11/913:45 -
Nonstop7h 55m
Fri 18/919:35 -
Nonstop7h 15m
Deal found 12/8£716
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 17 August 2026.
Wed 30/913:00 -
Nonstop8h 00m
Wed 28/1019:35 -
Nonstop7h 00m
Deal found 15/8£599
Mon 14/913:45 -
Nonstop7h 55m
Mon 21/922:10 -
Nonstop7h 10m
Deal found 15/8£614
Tue 15/913:45 -
Nonstop7h 55m
Tue 22/922:10 -
Nonstop7h 10m
Deal found 16/8£615
Wed 7/1013:00 -
Nonstop8h 00m
Wed 21/1022:10 -
Nonstop7h 10m
Deal found 14/8£615
Mon 14/913:00 -
Nonstop8h 00m
Tue 22/922:10 -
Nonstop7h 10m
Deal found 13/8£616
Mon 14/913:00 -
Nonstop8h 00m
Mon 21/918:45 -
Nonstop7h 05m
Deal found 15/8£617
Tue 15/913:00 -
Nonstop8h 00m
Tue 22/919:35 -
Nonstop7h 15m
Deal found 16/8£618
Tue 20/1013:45 -
Nonstop7h 55m
Mon 2/1118:35 -
Nonstop7h 00m
Deal found 13/8£623
Thu 10/913:00 -
Nonstop8h 00m
Thu 24/919:35 -
Nonstop7h 15m
Deal found 13/8£624
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 17 August 2026 and is based on user searches.
Wed 9/912:00 -
1 stop11h 55m
Wed 16/920:25 -
1 stop9h 45m
Deal found 12/8£584
Mon 14/912:00 -
1 stop11h 55m
Mon 21/920:25 -
1 stop9h 45m
Deal found 15/8£587
Mon 14/909:15 -
Nonstop7h 55m
Tue 22/913:39 -
1 stop15h 01m
Deal found 13/8£589
Mon 14/906:40 -
2 stops23h 00m
Mon 21/909:25 -
2 stops27h 15m
Deal found 12/8£590
Tue 15/907:25 -
2 stops16h 29m
Tue 22/907:00 -
2 stops33h 00m
Deal found 16/8£584
Thu 17/913:25 -
1 stop10h 30m
Mon 21/920:25 -
1 stop9h 45m
Deal found 12/8£582
Thu 17/909:50 -
1 stop14h 05m
Sun 20/920:25 -
1 stop17h 30m
Deal found 13/8£586
Thu 17/906:40 -
2 stops20h 43m
Mon 21/909:25 -
2 stops27h 15m
Deal found 12/8£589
Wed 23/907:30 -
2 stops16h 24m
Sun 4/1016:20 -
2 stops23h 40m
Deal found 13/8£583
Fri 25/912:00 -
1 stop11h 55m
Sat 3/1020:25 -
1 stop12h 30m
Deal found 12/8£581
Fri 25/912:00 -
1 stop11h 55m
Fri 9/1020:25 -
1 stop12h 05m
Deal found 13/8£588
Tue 29/906:40 -
2 stops20h 41m
Tue 6/1012:25 -
2 stops24h 15m
Deal found 15/8£591
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 17 August 2026.
Wed 28/1019:30 -
2 stops25h 30m
Deal found 12/8£348
Tue 1/909:55 -
3 stops55h 34m
Deal found 12/8£352
Sun 1/1120:50 -
3 stops48h 10m
Deal found 13/8£354
Tue 27/1020:50 -
3 stops54h 57m
Deal found 12/8£356
Wed 25/1120:50 -
3 stops48h 10m
Deal found 14/8£359
Thu 7/112:05 -
1 stop11h 35m
Deal found 13/8£360
Sun 18/1011:05 -
2 stops36h 50m
Deal found 16/8£360
Fri 16/1008:45 -
2 stops15h 10m
Deal found 16/8£362
Thu 15/1019:25 -
2 stops28h 30m
Deal found 15/8£363
Mon 30/1109:55 -
3 stops35h 05m
Deal found 14/8£364
Sat 14/1120:50 -
3 stops48h 10m
Deal found 14/8£365
Wed 16/915:00 -
2 stops37h 55m
Deal found 14/8£366
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 17 August 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 17 August 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
Wed 7/10
07:05-22:07
3 stops20h 02m
Philadelphia
Wed 14/10
09:20-18:30
2 stops28h 10m
£598
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Fri 16/10
16:00-09:42
2 stops22h 42m
Philadelphia
Sun 18/10
07:00-06:35
1 stop18h 35m
£609
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Wed 11/11
06:30-14:05
1 stop12h 35m
Philadelphia
Wed 18/11
19:50-07:50
Nonstop7h 00m
£623
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 22/10
19:30-22:12
2 stops31h 42m
Philadelphia
Sat 31/10
13:40-21:40
2 stops28h 00m
£630
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Mon 14/9
06:30-19:09
2 stops17h 39m
Philadelphia
Mon 21/9
17:00-09:15
1 stop11h 15m
£663
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 10/9
06:00-22:03
2 stops21h 03m
Philadelphia
Thu 24/9
06:00-11:00
2 stops24h 00m
£673
Fastest return journey
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Fri 18/9
13:00-16:00
Nonstop8h 00m
Philadelphia
Wed 23/9
18:45-06:50
Nonstop7h 05m
£686
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Wed 30/9
08:00-09:31
2 stops30h 31m
Philadelphia
Wed 7/10
18:48-17:45
3 stops17h 57m
£687
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Thu 22/10
08:40-17:59
1 stop14h 19m
Philadelphia
Mon 2/11
15:30-06:55
1 stop10h 25m
£697
LondonPhiladelphia
LHR London Heathrow - PHL Philadelphia
LHRPHL
London Heathrow
Sun 27/9
09:15-12:10
Nonstop7h 55m
Philadelphia
Sun 4/10
17:30-08:00
1 stop9h 30m
£715
Flights are sorted by cheapest return flights first.
Deals found on 16/8
Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
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 £553). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £850). 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 17 August 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 below average for this route at the moment.
London Heathrow Airport to Philadelphia flights typically cost between £725 and £925 in September.The cheapest return price found within the last 5 days was £581 on Aer Lingus (25 Sept–3 Oct).
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 17 August 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 17% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 162 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 15% 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 67% 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 17 August 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 Scandinavian Airlines, United Airlines, and British Airways fly from London Heathrow Airport to Philadelphia in about 12h 35m. The time it takes to get you to your destination can typically vary by up to 10h 07m. 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 £460 round-trip. JetBlue is currently priced 36% 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 £401. On average you can expect to pay £1,734. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £456.
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 £553). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £850). 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
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.
Airlines
Alternative routes
Complete your trip
Direct flights to Pennsylvania
Flights by cabin class
Other flight options
Other flights from Heathrow
Philadelphia flight routes
Popular flights
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 17 August 2026.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 17 August 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 858,174 searches. Data last updated 17 August 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.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.