Cheap flights from London Heathrow Airport to Philadelphia from £347
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 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
3 Sep — 10 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 November or March, booked 30 days in advance, depart on a Tuesday or Monday and return on a Saturday
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 4 August 2026.
Wed 16/907:05 -
3 stops20h 16m
Tue 22/913:24 -
3 stops20h 11m
Deal found 4/8£587
Tue 29/914:10 -
2 stops29h 10m
Tue 13/1015:25 -
1 stop13h 35m
Deal found 4/8£588
Sat 29/808:40 -
1 stop16h 21m
Sun 6/909:12 -
1 stop16h 18m
Deal found 3/8£589
Tue 29/914:10 -
2 stops29h 10m
Thu 8/1010:35 -
1 stop20h 15m
Deal found 4/8£592
Mon 28/907:45 -
2 stops20h 45m
Mon 5/1010:40 -
1 stop15h 15m
Deal found 4/8£592
Tue 29/909:30 -
2 stops19h 00m
Mon 5/1009:34 -
1 stop16h 11m
Deal found 4/8£595
Wed 23/909:30 -
2 stops18h 57m
Mon 5/1019:30 -
1 stop10h 10m
Deal found 1/8£595
Thu 3/907:30 -
1 stop13h 35m
Wed 9/910:30 -
2 stops18h 30m
Deal found 4/8£596
Mon 31/817:55 -
2 stops28h 59m
Mon 7/916:20 -
2 stops47h 40m
Deal found 2/8£597
Thu 17/907:30 -
1 stop13h 35m
Thu 1/1010:40 -
2 stops18h 20m
Deal found 3/8£598
Wed 30/914:10 -
2 stops24h 33m
Mon 12/1015:25 -
1 stop13h 35m
Deal found 4/8£599
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 4 August 2026.
Tue 1/909:30 -
2 stops14h 23m
Tue 8/910:30 -
2 stops15h 00m
Deal found 4/8£595
Sun 20/908:40 -
1 stop11h 22m
Fri 2/1010:42 -
1 stop14h 48m
Deal found 3/8£601
Thu 3/906:40 -
2 stops23h 39m
Tue 8/909:25 -
2 stops28h 05m
Deal found 2/8£613
Wed 2/912:30 -
Nonstop8h 05m
Wed 16/918:45 -
Nonstop7h 05m
Deal found 31/7£668
Mon 7/909:15 -
Nonstop8h 00m
Mon 14/918:45 -
Nonstop7h 05m
Deal found 31/7£677
Thu 17/906:15 -
1 stop12h 30m
Thu 24/918:45 -
Nonstop7h 05m
Deal found 3/8£679
Thu 8/1018:45 -
2 stops32h 58m
Sun 11/1015:25 -
3 stops37h 55m
Deal found 30/7£681
Thu 3/910:50 -
2 stops19h 09m
Wed 9/910:30 -
2 stops17h 50m
Deal found 4/8£598
Fri 18/908:40 -
1 stop11h 22m
Sun 4/1010:42 -
1 stop14h 48m
Deal found 3/8£622
Thu 3/907:25 -
2 stops19h 18m
Tue 8/910:30 -
2 stops18h 30m
Deal found 2/8£602
Wed 9/907:05 -
3 stops20h 26m
Wed 16/913:24 -
2 stops27h 16m
Deal found 31/7£686
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 4 August 2026.
Wed 2/909:15 -
Nonstop8h 00m
Wed 9/918:45 -
Nonstop7h 05m
Deal found 3/8£588
Wed 30/913:00 -
Nonstop8h 00m
Wed 28/1019:35 -
Nonstop7h 00m
Deal found 3/8£602
Mon 7/909:15 -
Nonstop8h 00m
Mon 14/922:10 -
Nonstop7h 10m
Deal found 3/8£608
Mon 31/809:15 -
Nonstop8h 00m
Mon 7/919:35 -
Nonstop7h 15m
Deal found 1/8£615
Mon 21/913:45 -
Nonstop7h 55m
Sun 4/1022:10 -
Nonstop7h 10m
Deal found 1/8£616
Thu 10/909:15 -
Nonstop7h 55m
Mon 21/922:10 -
Nonstop7h 10m
Deal found 3/8£618
Mon 2/1113:10 -
Nonstop8h 05m
Sun 8/1119:50 -
Nonstop7h 00m
Deal found 1/8£627
Thu 3/909:15 -
Nonstop8h 00m
Mon 7/919:35 -
Nonstop7h 15m
Deal found 1/8£630
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 4 August 2026 and is based on user searches.
Sat 29/808:40 -
1 stop16h 21m
Sun 6/909:12 -
1 stop16h 18m
Deal found 3/8£589
Mon 31/815:30 -
1 stop29h 35m
Mon 7/907:00 -
2 stops33h 00m
Deal found 2/8£597
Thu 3/907:30 -
1 stop13h 35m
Wed 9/910:30 -
2 stops18h 30m
Deal found 4/8£596
Wed 16/907:05 -
3 stops20h 16m
Tue 22/913:24 -
3 stops20h 11m
Deal found 4/8£587
Thu 17/907:30 -
1 stop13h 35m
Thu 1/1010:40 -
2 stops18h 20m
Deal found 3/8£598
Wed 23/909:30 -
2 stops18h 57m
Mon 5/1019:30 -
1 stop10h 10m
Deal found 1/8£595
Mon 28/907:45 -
2 stops20h 45m
Wed 7/1015:08 -
1 stop14h 32m
Deal found 4/8£592
Tue 29/914:10 -
2 stops29h 10m
Mon 12/1015:25 -
1 stop13h 35m
Deal found 4/8£588
Tue 29/914:10 -
2 stops29h 10m
Thu 8/1010:35 -
1 stop20h 15m
Deal found 4/8£592
Tue 29/909:30 -
2 stops19h 00m
Tue 6/1009:34 -
1 stop16h 11m
Deal found 4/8£595
Wed 30/914:10 -
2 stops24h 33m
Mon 12/1015:25 -
1 stop13h 35m
Deal found 4/8£599
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 4 August 2026.
Tue 22/908:45 -
2 stops15h 10m
Deal found 3/8£347
Wed 23/908:45 -
2 stops15h 10m
Deal found 4/8£348
Wed 7/1008:45 -
2 stops15h 10m
Deal found 3/8£351
Wed 30/908:45 -
2 stops15h 10m
Deal found 4/8£354
Tue 22/908:40 -
1 stop29h 51m
Deal found 3/8£355
Sun 1/1118:35 -
2 stops26h 25m
Deal found 4/8£356
Tue 27/1008:45 -
2 stops36h 15m
Deal found 4/8£357
Wed 26/815:00 -
3 stops58h 28m
Deal found 3/8£360
Mon 28/908:45 -
2 stops15h 10m
Deal found 1/8£361
Wed 2/911:30 -
3 stops56h 59m
Deal found 2/8£365
Fri 4/920:00 -
3 stops48h 29m
Deal found 3/8£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 4 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 4 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 - PHL
LHRPHL
London Heathrow
Tue 1/9
09:30-18:53
2 stops14h 23m
Philadelphia
Tue 8/9
10:30-06:30
2 stops15h 00m
£595
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 3/9
10:50-00:59
2 stops19h 09m
Philadelphia
Wed 9/9
10:30-09:20
2 stops17h 50m
£598
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Sun 20/9
08:40-15:02
1 stop11h 22m
Philadelphia
Fri 2/10
10:42-06:30
1 stop14h 48m
£601
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 3/9
07:25-21:43
2 stops19h 18m
Philadelphia
Tue 8/9
10:30-10:00
2 stops18h 30m
£602
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 3/9
06:40-01:19
2 stops23h 39m
Philadelphia
Tue 8/9
09:25-18:30
2 stops28h 05m
£613
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 18/9
08:40-15:02
1 stop11h 22m
Philadelphia
Sun 4/10
10:42-06:30
1 stop14h 48m
£622
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 2/9
12:30-15:35
Nonstop8h 05m
Philadelphia
Wed 16/9
18:45-06:50
Nonstop7h 05m
£668
Fastest return journey
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 7/9
09:15-12:15
Nonstop8h 00m
Philadelphia
Mon 14/9
18:45-06:50
Nonstop7h 05m
£677
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 17/9
06:15-13:45
1 stop12h 30m
Philadelphia
Thu 24/9
18:45-06:50
Nonstop7h 05m
£679
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 8/10
18:45-22:43
2 stops32h 58m
Philadelphia
Sun 11/10
15:25-10:20
3 stops37h 55m
£681
Flights are sorted by cheapest return flights first.
Deals found on 30/7
Showing 1-10 of 22 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 29 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 £557). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £815). 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 4 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 £660 and £891 in September.The cheapest return price found within the last 5 days was £587 on Scandinavian Airlines (16 Sept–22 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 4 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 18% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 164 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 16% 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 64% 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.
Frankfurt am Main (FRA) is the most affordable one-stop option, with an average return flight price of £450.
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 55m.
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 4 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 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, JetBlue, and Scandinavian Airlines fly from London Heathrow Airport to Philadelphia in about 11h 22m. The time it takes to get you to your destination can typically vary by up to 12h 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 Lufthansa. Our recent data shows that you can find tickets from as low as £334 on this airline. Additional options worth looking into are JetBlue and Air Canada, starting at £418 and £433 round-trip. Lufthansa is currently priced 48% 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 £349. However, be on the lookout for offers from Iberia 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 (86%), American Airlines (82%) or Finnair (82%) 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 £403. On average you can expect to pay £2,073. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £446.
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 £557). Flying from London Heathrow Airport to Philadelphia in August is currently the most expensive (average of £815). 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.
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 4 August 2026.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 4 August 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 4 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.