Cheap flights from London Heathrow Airport to Philadelphia from £268
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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — PHL
12 Jan — 19 Jan1
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 February, booked 25 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday
Cheap flight deals from Heathrow to Philadelphia
Enter your travel dates to find the best prices.
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 13 December 2025.
Wed 31/1213:30LHR - PHL
1 stop31h 35mUnited Airlines
Thu 8/113:10PHL - LHR
1 stop13h 45mUnited Airlines
Deal found 13/12£573
Mon 29/1206:05LHR - PHL
1 stop14h 05mFinnair
Mon 12/121:31PHL - LHR
1 stop28h 29mFinnair
Deal found 11/12£575
Wed 31/1213:30LHR - PHL
1 stop31h 35mUnited Airlines
Mon 5/117:00PHL - LHR
1 stop31h 55mUnited Airlines
Deal found 13/12£577
Mon 29/1209:00LHR - PHL
2 stops34h 50mAir Canada
Mon 12/107:50PHL - LHR
2 stops31h 45mAir Canada
Deal found 13/12£581
Thu 25/1214:10LHR - PHL
1 stop24h 31mFinnair
Thu 8/111:00PHL - LHR
1 stop14h 30mFinnair
Deal found 11/12£598
Fri 26/1206:30LHR - PHL
1 stop12h 25mBritish Airways
Thu 8/115:35PHL - LHR
1 stop10h 25mBritish Airways
Deal found 11/12£600
Mon 29/1209:40LHR - PHL
1 stop15h 14mVirgin Atlantic
Mon 12/117:17PHL - LHR
1 stop10h 28mVirgin Atlantic
Deal found 13/12£601
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 13 December 2025.
Thu 12/206:30LHR - PHL
1 stop12h 30mBritish Airways
Thu 26/219:45PHL - LHR
Nonstop7h 05mBritish Airways
Deal found 11/12£540
Mon 6/415:30LHR - PHL
1 stop29h 30mUnited Airlines
Mon 20/409:15PHL - LHR
2 stops30h 45mUnited Airlines
Deal found 10/12£542
Mon 13/406:00LHR - PHL
2 stops22h 11mTAP AIR PORTUGAL
Wed 13/515:15PHL - LHR
3 stops21h 30mTAP AIR PORTUGAL
Deal found 11/12£585
Fri 6/207:50LHR - PHL
1 stop11h 15mBritish Airways
Mon 16/215:40PHL - LHR
1 stop10h 20mBritish Airways
Deal found 13/12£543
Fri 9/107:25LHR - PHL
1 stop15h 09mUnited Airlines
Fri 16/107:50PHL - LHR
2 stops20h 30mUnited Airlines
Deal found 12/12£566
Mon 12/113:35LHR - PHL
1 stop29h 30mBritish Airways
Mon 19/118:35PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 12/12£547
Fri 24/409:30LHR - PHL
1 stop11h 30mUnited Airlines
Fri 8/510:05PHL - LHR
1 stop15h 25mUnited Airlines
Deal found 11/12£595
Sat 21/206:30LHR - PHL
1 stop12h 30mBritish Airways
Sat 7/315:40PHL - LHR
1 stop10h 20mBritish Airways
Deal found 11/12£570
Thu 15/107:50LHR - PHL
1 stop11h 15mBritish Airways
Fri 30/118:35PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 13/12£573
Thu 22/110:15LHR - PHL
Nonstop8h 15mBritish Airways
Mon 26/115:45PHL - LHR
1 stop12h 55mBritish Airways
Deal found 12/12£584
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 13 December 2025.
Tue 27/110:35LHR - PHL
Nonstop8h 15mFinnair
Tue 3/218:35PHL - LHR
Nonstop7h 00mFinnair
Deal found 13/12£529
Mon 12/110:15LHR - PHL
Nonstop8h 15mBritish Airways
Mon 19/119:50PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 12/12£536
Wed 29/413:45LHR - PHL
Nonstop7h 55mBritish Airways
Mon 4/518:45PHL - LHR
Nonstop7h 05mBritish Airways
Deal found 13/12£539
Tue 28/409:15LHR - PHL
Nonstop8h 00mBritish Airways
Mon 11/518:45PHL - LHR
Nonstop7h 05mBritish Airways
Deal found 12/12£540
Mon 19/110:15LHR - PHL
Nonstop8h 15mAmerican Airlines
Mon 26/119:50PHL - LHR
Nonstop7h 00mAmerican Airlines
Deal found 12/12£543
Tue 27/110:35LHR - PHL
Nonstop8h 15mBritish Airways
Tue 3/219:50PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 13/12£546
Mon 6/409:15LHR - PHL
Nonstop8h 00mBritish Airways
Mon 20/419:40PHL - LHR
Nonstop7h 10mBritish Airways
Deal found 10/12£551
Mon 20/413:45LHR - PHL
Nonstop7h 55mBritish Airways
Mon 27/419:40PHL - LHR
Nonstop7h 10mBritish Airways
Deal found 12/12£553
Thu 12/313:10LHR - PHL
Nonstop8h 05mBritish Airways
Thu 19/319:35PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 11/12£554
Thu 29/110:35LHR - PHL
Nonstop8h 15mBritish Airways
Thu 30/422:20PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 11/12£555
Last-minute flights from Heathrow to Philadelphia
Discover last-minute flight deals from Heathrow to Philadelphia. Data last updated 13 December 2025 and is based on user searches.
Tue 6/109:00LHR - PHL
2 stops42h 46mUnited Airlines
Mon 12/119:45PHL - LHR
2 stops33h 20mUnited Airlines
Deal found 11/12£546
Mon 12/110:15LHR - PHL
Nonstop8h 15mBritish Airways
Mon 19/119:50PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 12/12£536
Thu 15/107:50LHR - PHL
1 stop11h 15mBritish Airways
Mon 19/119:50PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 11/12£540
Fri 16/109:00LHR - PHL
2 stops18h 46mAir Canada
Sun 18/116:35PHL - LHR
1 stop32h 55mAir Canada
Deal found 13/12£535
Mon 19/113:25LHR - PHL
2 stops14h 21mAir Canada
Sun 25/115:30PHL - LHR
2 stops34h 00mAir Canada
Deal found 11/12£543
Thu 22/109:00LHR - PHL
2 stops18h 46mAir Canada
Mon 26/115:30PHL - LHR
1 stop10h 40mAir Canada
Deal found 12/12£533
Tue 27/110:35LHR - PHL
Nonstop8h 15mFinnair
Tue 3/218:35PHL - LHR
Nonstop7h 00mFinnair
Deal found 13/12£529
Fri 30/107:50LHR - PHL
1 stop11h 15mBritish Airways
Wed 4/219:50PHL - LHR
Nonstop7h 00mBritish Airways
Deal found 13/12£540
Fri 30/107:50LHR - PHL
1 stop11h 15mAmerican Airlines
Wed 13/518:45PHL - LHR
Nonstop7h 05mAmerican Airlines
Deal found 11/12£544
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 13 December 2025.
Mon 9/209:55LHR - PHL
3 stops36h 17mMultiple Airlines
Deal found 13/12£268
Tue 17/309:20LHR - PHL
1 stop16h 27mJetBlue
Deal found 12/12£286
Tue 10/220:50LHR - PHL
2 stops49h 02mMultiple Airlines
Deal found 11/12£294
Wed 28/109:55LHR - PHL
2 stops35h 54mMultiple Airlines
Deal found 12/12£295
Sun 25/109:55LHR - PHL
3 stops54h 19mMultiple Airlines
Deal found 11/12£297
Sat 7/220:50LHR - PHL
2 stops45h 55mMultiple Airlines
Deal found 11/12£297
Mon 9/209:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 11/12£298
Wed 11/209:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 13/12£299
Mon 26/109:20LHR - PHL
1 stop14h 03mJetBlue
Deal found 12/12£300
Wed 11/309:55LHR - PHL
2 stops30h 18mMultiple Airlines
Deal found 12/12£301
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 13 December 2025.
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 13 December 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Philadelphia that are best for you.
Fly from
Heathrow
Fly to
Philadelphia
Route
Depart
Return
Price
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 12/2
06:30-14:00
1 stop12h 30m
Philadelphia
Thu 26/2
19:45-07:50
Nonstop7h 05m
£540
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 6/4
15:30-16:00
1 stop29h 30m
Philadelphia
Mon 20/4
09:15-21:00
2 stops30h 45m
£542
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 6/2
07:50-14:05
1 stop11h 15m
Philadelphia
Mon 16/2
15:40-07:00
1 stop10h 20m
£543
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 12/1
13:35-14:05
1 stop29h 30m
Philadelphia
Mon 19/1
18:35-06:35
Nonstop7h 00m
£547
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 9/1
07:25-17:34
1 stop15h 09m
Philadelphia
Fri 16/1
07:50-09:20
2 stops20h 30m
£566
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Sat 21/2
06:30-14:00
1 stop12h 30m
Philadelphia
Sat 7/3
15:40-07:00
1 stop10h 20m
£570
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 15/1
07:50-14:05
1 stop11h 15m
Philadelphia
Fri 30/1
18:35-06:35
Nonstop7h 00m
£573
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Thu 22/1
10:15-13:30
Nonstop8h 15m
Philadelphia
Mon 26/1
15:45-09:40
1 stop12h 55m
£584
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Mon 13/4
06:00-23:11
2 stops22h 11m
Philadelphia
Wed 13/5
15:15-17:45
3 stops21h 30m
£585
LondonPhiladelphia
LHR - PHL
LHRPHL
London Heathrow
Fri 24/4
09:30-16:00
1 stop11h 30m
Philadelphia
Fri 8/5
10:05-06:30
1 stop15h 25m
£595
Flights are sorted by cheapest return flights first.
Deals found on 11/12
Showing 1-10 of 17 results
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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.
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 12 December 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 25 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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £309). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £342). 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 13 December 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 20% 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 December 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. Friday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
How much does it cost for a return flight from London Heathrow Airport to Philadelphia?
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 13 December 2025.
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 17% of weekly flights between London and Philadelphia have experienced delays in the past year, with the average delay time being 175 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 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, British Airways 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 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 £535.
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 03m.
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 41m.
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 13 December 2025.
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.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
I was lucky I had a seet without no one next to me My vegetarian meal was excellent. The service very good. Although there was a lot of turbulences during the flight, the landing was very soft and took away all our apprehension.
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 10 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 and United Airlines fly from London Heathrow Airport to Philadelphia in about 12h 30m. The time it takes to get you to your destination can typically vary by up to 17h. 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 £303 on this airline. Additional options worth looking into are Air Canada and JetBlue, starting at £339 and £402 round-trip. United Airlines is currently priced 46% 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 British Airways, with whom users have recently found tickets for as low as £359. However, be on the lookout for offers from Aer Lingus 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 Malaysia Airlines (89%), American Airlines (85%) or Iberia (85%) 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 £399. On average you can expect to pay £842. The most popular route, (London Heathrow - Philadelphia), can usually be booked for £402.
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, February is the cheapest month in which you can book a flight from London Heathrow Airport to Philadelphia (average of £309). Flying from London Heathrow Airport to Philadelphia in June is currently the most expensive (average of £342). 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.
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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 13 December 2025.
Browse through other flights departing from Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 13 December 2025.
Explore flights to Philadelphia departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 13 December 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 13 December 2025.
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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