Cheap flights from London Heathrow Airport to Philadelphia from £386
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 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London Heathrow to Philadelphia are usually found in March or February, booked 79 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday
Cheap 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 11 July 2025.
Round-trip from | £455 |
---|---|
One-way from | £386 |
Popular in | July |
Cheapest in | March |
Average price | £685 |
Good round-trip deal | £519 or less |
Good one-way deal | £673 or less |
Find flight deals from Heathrow to Philadelphia
Cheapest flights from Heathrow to PhiladelphiaExplore 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 11 July 2025.
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 11 July 2025.
Cheapflights Fare Finder
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 11 July 2025.
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 3/9
06:40-11:06
2 stops33h 26m
Philadelphia
Sun 7/9
07:15-17:40
2 stops29h 25m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Sat 20/9
08:25-21:24
1 stop17h 59m
Philadelphia
Wed 24/9
15:10-06:30
1 stop10h 20m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 6/8
07:55-14:05
1 stop11h 10m
Philadelphia
Tue 19/8
15:55-12:15
2 stops15h 20m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 29/8
08:15-16:55
2 stops37h 40m
Philadelphia
Thu 11/9
15:10-06:30
1 stop10h 20m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 2/10
06:50-14:38
2 stops12h 48m
Philadelphia
Mon 13/10
15:25-09:35
1 stop13h 10m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 1/9
09:30-22:07
1 stop17h 37m
Philadelphia
Tue 9/9
06:30-06:20
1 stop18h 50m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 11/9
09:30-16:00
1 stop11h 30m
Philadelphia
Thu 18/9
10:10-06:55
2 stops15h 45m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 15/9
10:05-13:05
Nonstop8h 00m
Philadelphia
Mon 16/2
19:45-07:50
Nonstop7h 05m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 1/9
10:05-13:10
Nonstop8h 05m
Philadelphia
Tue 9/9
19:50-08:05
Nonstop7h 15m
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Wed 17/9
06:30-16:52
2 stops15h 22m
Philadelphia
Thu 25/9
13:35-06:45
1 stop12h 10m
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.
Cheapflights Insights
Everything you need to know about your flight from London Heathrow Airport to Philadelphia
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 June 2025.
To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Philadelphia, you should look to book at least 79 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 £648). Flying from London Heathrow Airport to Philadelphia in July is currently the most expensive (average of £839). 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 11 July 2025.
A simple way to save on the total cost of your ticket is to fly from London Heathrow Airport to Philadelphia in the afternoon. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the morning.
What is the cheapest day to fly from London Heathrow Airport to Philadelphia?
Use this chart to determine the cheapest time to fly return from Heathrow to Philadelphia. Price data was last updated on 6 July 2025.
Travellers seeking maximum savings on their London Heathrow Airport to Philadelphia flight should consider departing on Friday afternoons when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 11 July 2025.
The most flights from LHR to PHL are scheduled on a Monday (15 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (10 on average).
How much does it cost for a return flight from London Heathrow Airport to Philadelphia?
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 11 July 2025.
Get a feel of what it's like to fly with Finnair, SWISS, andUnited 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.
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
Entertainment
Comfort
Crew
Boarding
Overall
Food
Reviews
Anonymous,May 2025
FRA - DFW
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.
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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 11 July 2025.
Top 10 airlines flying from Heathrow to Philadelphia
Discover the top 10 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 11 July 2025.
Fly with Cheapflights
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.