Cheap flights from Philadelphia to London Heathrow Airport from £237
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
16 Oct — 23 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Philadelphia to London Heathrow are usually found in February or January, booked 77 days in advance, depart on a Tuesday or Monday and return on a Tuesday
Cheap flight deals from Philadelphia to Heathrow
Enter your travel dates to find the best prices.
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Best
Direct
Last-minute
One-way
Cheapest flights from Philadelphia to Heathrow
Explore the most affordable flight options available from Philadelphia to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 16 September 2026.
Wed 7/1016:20 -
2 stops16h 35m
Tue 13/1021:10 -
2 stops23h 31m
Deal found 13/9£559
Wed 7/1015:25 -
1 stop13h 35m
Tue 13/1014:05 -
1 stop12h 27m
Deal found 11/9£584
Sat 28/1117:05 -
1 stop32h 25m
Wed 16/1215:00 -
1 stop12h 56m
Deal found 16/9£590
Sat 3/1020:55 -
1 stop29h 45m
Tue 20/1009:15 -
Nonstop7h 55m
Deal found 15/9£591
Wed 2/1218:35 -
Nonstop7h 00m
Sun 6/1206:10 -
1 stop14h 40m
Deal found 16/9£592
Sun 18/1022:10 -
Nonstop7h 10m
Sun 1/1106:10 -
1 stop14h 25m
Deal found 15/9£593
Wed 30/920:25 -
1 stop9h 45m
Mon 5/1009:50 -
1 stop14h 05m
Deal found 15/9£593
Mon 5/1007:00 -
1 stop18h 35m
Mon 12/1018:40 -
2 stops26h 25m
Deal found 16/9£594
Wed 7/1015:25 -
1 stop13h 35m
Mon 12/1018:40 -
2 stops26h 25m
Deal found 15/9£595
Sat 31/1017:05 -
1 stop33h 25m
Sat 7/1118:40 -
2 stops26h 25m
Deal found 16/9£596
Thu 12/1116:25 -
1 stop9h 35m
Thu 19/1106:30 -
1 stop12h 30m
Deal found 15/9£596
Thu 12/1118:35 -
Nonstop7h 00m
Wed 18/1106:30 -
1 stop12h 30m
Deal found 15/9£597
Best flights from Philadelphia to Heathrow
Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 16 September 2026.
Thu 3/1216:47 -
1 stop9h 13m
Wed 9/1206:30 -
1 stop12h 35m
Deal found 15/9£593
Fri 6/1119:40 -
Nonstop7h 10m
Mon 9/1119:50 -
1 stop24h 05m
Deal found 15/9£607
Tue 24/1112:20 -
2 stops13h 55m
Tue 1/1211:45 -
2 stops16h 42m
Deal found 12/9£619
Tue 8/1212:09 -
1 stop14h 41m
Sun 13/1208:40 -
2 stops18h 31m
Deal found 13/9£622
Thu 24/906:15 -
1 stop23h 25m
Sun 4/1014:05 -
1 stop29h 42m
Deal found 13/9£646
Fri 6/1117:58 -
2 stops22h 37m
Tue 10/1106:00 -
3 stops44h 11m
Deal found 13/9£734
Tue 6/1012:25 -
3 stops23h 35m
Tue 27/1006:40 -
2 stops19h 27m
Deal found 14/9£786
Thu 29/1018:04 -
2 stops20h 51m
Sat 7/1119:55 -
3 stops40h 42m
Deal found 12/9£792
Fri 9/1010:40 -
2 stops16h 55m
Mon 12/1014:10 -
3 stops29h 10m
Deal found 14/9£717
Sun 4/1012:07 -
1 stop13h 18m
Thu 15/1008:40 -
2 stops18h 27m
Deal found 11/9£748
Mon 14/1211:50 -
1 stop14h 15m
Sat 19/1211:30 -
2 stops16h 41m
Deal found 15/9£751
Tue 15/1206:00 -
2 stops18h 55m
Wed 16/1218:00 -
2 stops25h 39m
Deal found 12/9£757
Direct flights from Philadelphia to Heathrow
Explore direct flight options from Philadelphia to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 16 September 2026.
Wed 25/1119:40 -
Nonstop7h 10m
Sat 5/1210:35 -
Nonstop8h 15m
Deal found 15/9£598
Mon 23/1118:35 -
Nonstop7h 00m
Tue 1/1213:10 -
Nonstop8h 05m
Deal found 15/9£600
Wed 2/1218:35 -
Nonstop7h 00m
Sun 6/1213:10 -
Nonstop8h 05m
Deal found 16/9£605
Thu 1/1018:45 -
Nonstop7h 05m
Tue 6/1013:45 -
Nonstop7h 55m
Deal found 11/9£606
Wed 23/919:35 -
Nonstop7h 15m
Sun 4/1009:15 -
Nonstop7h 55m
Deal found 14/9£608
Tue 24/1118:35 -
Nonstop7h 00m
Tue 1/1213:10 -
Nonstop8h 05m
Deal found 15/9£610
Fri 16/1018:45 -
Nonstop7h 05m
Tue 20/1013:45 -
Nonstop7h 55m
Deal found 14/9£611
Mon 7/1218:35 -
Nonstop7h 00m
Mon 14/1213:10 -
Nonstop8h 05m
Deal found 14/9£613
Thu 15/1018:45 -
Nonstop7h 05m
Tue 20/1013:45 -
Nonstop7h 55m
Deal found 14/9£614
Sat 26/920:20 -
Nonstop7h 15m
Sun 4/1009:15 -
Nonstop7h 55m
Deal found 14/9£615
Mon 12/1022:10 -
Nonstop7h 10m
Mon 19/1013:00 -
Nonstop8h 00m
Deal found 14/9£616
Mon 5/1022:10 -
Nonstop7h 10m
Sun 11/1009:15 -
Nonstop7h 55m
Deal found 16/9£616
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 16 September 2026 and is based on user searches.
Tue 29/917:40 -
2 stops14h 20m
Mon 5/1018:40 -
2 stops26h 25m
Deal found 15/9£590
Tue 29/915:25 -
1 stop10h 05m
Mon 5/1019:30 -
2 stops25h 35m
Deal found 15/9£599
Wed 30/920:25 -
1 stop9h 45m
Mon 5/1009:50 -
1 stop14h 05m
Deal found 15/9£593
Sat 3/1020:55 -
1 stop29h 45m
Tue 20/1009:15 -
Nonstop7h 55m
Deal found 15/9£591
Mon 5/1007:00 -
1 stop18h 35m
Mon 12/1018:40 -
2 stops26h 25m
Deal found 16/9£594
Wed 7/1016:20 -
2 stops16h 35m
Tue 13/1021:10 -
2 stops23h 31m
Deal found 13/9£559
Wed 7/1015:25 -
1 stop13h 35m
Tue 13/1014:05 -
1 stop12h 27m
Deal found 11/9£584
Wed 7/1015:25 -
1 stop13h 35m
Mon 12/1018:40 -
2 stops26h 25m
Deal found 15/9£595
Sun 18/1022:10 -
Nonstop7h 10m
Sun 1/1106:10 -
1 stop14h 25m
Deal found 15/9£593
Wed 28/1018:40 -
1 stop9h 25m
Mon 2/1108:50 -
1 stop12h 20m
Deal found 16/9£598
Fri 30/1019:25 -
1 stop10h 15m
Thu 5/1106:30 -
1 stop12h 30m
Deal found 16/9£596
Sat 31/1017:05 -
1 stop33h 25m
Sat 7/1118:40 -
2 stops26h 25m
Deal found 16/9£596
One-way flights from Philadelphia to Heathrow
Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated 16 September 2026.
Mon 26/1010:27 -
1 stop16h 28m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£237
Wed 18/1110:27 -
1 stop15h 28m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 13/9£239
Thu 10/1209:30 -
1 stop16h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£240
Fri 27/1109:10 -
1 stop16h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£241
Sat 10/1006:30 -
1 stop19h 00m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 12/9£243
Sun 11/1010:22 -
1 stop15h 08m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£244
Tue 10/1110:27 -
1 stop15h 28m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£245
Wed 11/1117:22 -
2 stops38h 28m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 11/9£247
Thu 15/1019:19 -
1 stop30h 11m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 15/9£252
Mon 16/1117:22 -
2 stops38h 28m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 14/9£255
Find flight deals from Philadelphia to Heathrow
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Heathrow (LHR). 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 16 September 2026.
Customise your flight search to find flights from Philadelphia to Heathrow 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 16 September 2026.
Use the filters below to find and compare flights from Philadelphia to London Heathrow Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 11/10
10:22-06:30
1 stop15h 08m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£244
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 10/12
09:30-06:55
1 stop16h 25m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£244
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 17/10
15:26-06:30
1 stop10h 04m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£244
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 10/11
10:27-06:55
1 stop15h 28m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£244
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 25/10
10:27-06:55
1 stop16h 28m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£244
Fastest return journey
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 13/12
18:35-06:35
Nonstop7h 00m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£291
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 25/11
13:25-06:55
1 stop12h 30m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£311
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 7/10
10:42-06:30
1 stop14h 48m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£355
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 7/10
18:48-17:45
3 stops17h 57m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£458
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 13/12
19:33-17:30
3 stops16h 57m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£458
Flights are sorted by cheapest return flights first.
Deals found on 12/9
Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Philadelphia to Heathrow
Have a flexible travel schedule? Discover the best time to fly to Heathrow from Philadelphia with our price prediction graph.
PHL-LHR
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 Philadelphia to London Heathrow Airport
Prices
Airlines
How far ahead should I book a flight from Philadelphia to London Heathrow Airport?
The best time to book flights from Philadelphia to London Heathrow Airport is 76 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Philadelphia to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £522). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,103). 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 PHL to LHR?
Find hourly flight availability from Philadelphia to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 16 September 2026.
When flying from Philadelphia to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
How much does it cost for a return flight from Philadelphia to London Heathrow Airport?
Airfare is below average for this route at the moment.
Philadelphia to London Heathrow Airport flights typically cost between £697 and £855 in October.The cheapest return price found within the last 5 days was £559 on Multiple Airlines (7 Oct–13 Oct).
Weekly flight availability from Philadelphia to London Heathrow Airport
Explore weekly flight availability from Philadelphia to Heathrow. 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 16 September 2026.
The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).
Reviews of airlines servicing Heathrow
Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 16 September 2026.
Get a feel of what it's like to fly with American Airlines and British Airways from Philadelphia to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to Heathrow. 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 from for flights from Philadelphia to London Heathrow?
Philadelphia (PHL) is the airport you will fly out of if you book a flight from Philadelphia to London Heathrow. You should not have trouble finding flights to London Heathrow from Philadelphia; the airport handles an average of 13 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Philadelphia airport to London Heathrow. It is only a 7.0 mi journey to Philadelphia (PHL) from Philadelphia’s city center.
How long is the flight from Philadelphia to London Heathrow Airport?
For as low as £607, British Airways can have you in London Heathrow Airport from Philadelphia in 7h 10m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the cheapest airlines flying from Philadelphia to London Heathrow Airport round-trip?
Our cheapest airline available from Philadelphia to London Heathrow Airport is British Airways. Our recent data shows that you can find tickets from as low as £451 on this airline. An additional option worth looking into is American Airlines, starting at £520. Users have found that British Airways is 40% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Malaysia Airlines (76%), American Airlines (74%) or Finnair (74%) when booking your flight. These represent the most reliable airlines when flying from Philadelphia to London Heathrow Airport.
What are the cheapest flights from Philadelphia to London Heathrow Airport?
The cheapest flight price from Philadelphia to London Heathrow Airport is £243. On average you can expect to pay £581. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £535.
Can I find deals for business class flights from Philadelphia to Heathrow?
Yes. Cheapflights offers flight deals from Philadelphia to Heathrow 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 Philadelphia to London Heathrow Airport?
Currently, February is the cheapest month in which you can book a flight from Philadelphia to London Heathrow Airport (average of £522). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,103). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 16 September 2026.
Top 2 airlines flying from Philadelphia to Heathrow
Discover the top 2 airlines that operate flights from Philadelphia to Heathrow. 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 16 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 Philadelphia to Heathrow?
Cheapflights makes it easy to find Philadelphia to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Philadelphia to Heathrow?
Millions of users choose and trust Cheapflights to book the best flight deals from Philadelphia to Heathrow 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 Philadelphia to Heathrow with no change fees?
Need flexible booking options for your flight to Heathrow from Philadelphia? 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 Philadelphia to Heathrow become cheaper?
Yes! Start tracking prices for Philadelphia to Heathrow 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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