Cheap flights from Philadelphia to London Heathrow Airport from £180
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/10. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
4 Oct — 11 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 4 September 2026.
Tue 10/1116:25 -
1 stop9h 35m
Thu 12/1107:30 -
1 stop13h 05m
Deal found 3/9£613
Thu 5/1117:40 -
1 stop10h 25m
Mon 9/1118:35 -
2 stops26h 35m
Deal found 3/9£614
Fri 16/1020:25 -
1 stop11h 15m
Tue 27/1008:45 -
2 stops36h 25m
Deal found 4/9£615
Tue 15/1217:40 -
1 stop9h 25m
Tue 22/1209:50 -
1 stop11h 20m
Deal found 3/9£617
Wed 7/1020:25 -
1 stop11h 15m
Sun 11/1013:25 -
1 stop10h 30m
Deal found 3/9£620
Tue 3/1116:25 -
2 stops14h 40m
Tue 10/1107:20 -
1 stop12h 40m
Deal found 3/9£621
Sun 4/1020:25 -
1 stop11h 15m
Sun 11/1009:50 -
1 stop14h 05m
Deal found 4/9£622
Wed 4/1117:40 -
1 stop10h 25m
Wed 11/1108:50 -
1 stop12h 20m
Deal found 4/9£623
Sun 8/1117:40 -
1 stop9h 25m
Thu 19/1108:50 -
1 stop12h 20m
Deal found 3/9£624
Wed 21/1018:45 -
Nonstop7h 05m
Wed 4/1106:30 -
1 stop12h 30m
Deal found 3/9£625
Wed 14/1020:25 -
1 stop11h 15m
Tue 20/1013:25 -
1 stop10h 30m
Deal found 3/9£625
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 4 September 2026.
Wed 25/1118:35 -
Nonstop7h 00m
Wed 9/1206:30 -
1 stop12h 35m
Deal found 3/9£625
Tue 6/1014:26 -
1 stop11h 49m
Tue 13/1008:40 -
2 stops18h 27m
Deal found 2/9£642
Wed 7/1017:29 -
2 stops13h 36m
Tue 13/1006:30 -
2 stops17h 38m
Deal found 1/9£645
Sat 24/1020:25 -
Nonstop7h 25m
Sat 7/1106:30 -
1 stop12h 30m
Deal found 3/9£696
Wed 25/1112:20 -
2 stops13h 55m
Wed 9/1210:00 -
2 stops18h 27m
Deal found 31/8£645
Mon 4/109:40 -
1 stop17h 10m
Fri 8/106:30 -
2 stops19h 04m
Deal found 1/9£671
Tue 20/1005:20 -
1 stop20h 55m
Sat 24/1006:30 -
2 stops16h 48m
Deal found 2/9£679
Fri 18/906:00 -
1 stop22h 15m
Thu 1/1006:30 -
2 stops17h 49m
Deal found 1/9£685
Wed 7/1006:00 -
1 stop19h 45m
Mon 12/1012:25 -
2 stops15h 43m
Deal found 2/9£704
Fri 25/913:24 -
2 stops13h 31m
Fri 16/1011:15 -
1 stop18h 41m
Deal found 2/9£704
Sat 9/113:00 -
2 stops14h 05m
Sun 28/206:30 -
2 stops19h 04m
Deal found 31/8£726
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 4 September 2026.
Sun 15/1118:35 -
Nonstop7h 00m
Wed 18/1113:10 -
Nonstop8h 05m
Deal found 4/9£632
Tue 3/1118:35 -
Nonstop7h 00m
Tue 10/1113:10 -
Nonstop8h 05m
Deal found 3/9£633
Tue 12/119:50 -
Nonstop7h 00m
Tue 19/113:10 -
Nonstop8h 05m
Deal found 3/9£640
Wed 25/1118:35 -
Nonstop7h 00m
Thu 3/1213:10 -
Nonstop8h 05m
Deal found 3/9£645
Sun 8/1118:35 -
Nonstop7h 00m
Thu 19/1113:10 -
Nonstop8h 05m
Deal found 2/9£646
Sun 8/1118:35 -
Nonstop7h 00m
Thu 12/1113:10 -
Nonstop8h 05m
Deal found 3/9£648
Wed 21/1018:45 -
Nonstop7h 05m
Wed 11/1113:10 -
Nonstop8h 05m
Deal found 3/9£648
Mon 28/918:45 -
Nonstop7h 05m
Wed 7/1013:45 -
Nonstop7h 55m
Deal found 3/9£649
Mon 28/918:45 -
Nonstop7h 05m
Wed 7/1013:45 -
Nonstop7h 55m
Deal found 3/9£650
Tue 13/1018:45 -
Nonstop7h 05m
Thu 15/1013:45 -
Nonstop7h 55m
Deal found 4/9£651
Sun 11/1022:10 -
Nonstop7h 10m
Fri 23/1009:15 -
Nonstop7h 55m
Deal found 3/9£652
Wed 23/918:45 -
Nonstop7h 05m
Tue 6/1009:15 -
Nonstop7h 55m
Deal found 2/9£653
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 4 September 2026 and is based on user searches.
Wed 9/919:38 -
1 stop11h 37m
Wed 23/907:50 -
1 stop14h 55m
Deal found 2/9£631
Wed 9/918:59 -
1 stop13h 06m
Wed 16/909:55 -
2 stops17h 26m
Deal found 4/9£641
Wed 9/919:35 -
Nonstop7h 15m
Wed 23/909:15 -
Nonstop7h 55m
Deal found 2/9£653
Sun 13/922:10 -
Nonstop7h 10m
Wed 23/907:50 -
1 stop14h 55m
Deal found 3/9£628
Sun 13/918:59 -
1 stop13h 06m
Wed 16/911:45 -
2 stops15h 36m
Deal found 31/8£640
Sun 13/915:45 -
1 stop16h 20m
Wed 23/906:30 -
2 stops16h 38m
Deal found 3/9£642
Sun 13/918:59 -
1 stop13h 06m
Wed 16/909:55 -
2 stops17h 26m
Deal found 31/8£642
Sun 13/919:35 -
Nonstop7h 15m
Wed 16/909:15 -
Nonstop7h 55m
Deal found 3/9£652
Mon 14/912:29 -
2 stops15h 21m
Fri 25/909:55 -
2 stops17h 26m
Deal found 4/9£645
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 4 September 2026.
Sun 4/1020:25 -
1 stop11h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£180
Mon 26/1018:40 -
1 stop11h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£183
Mon 14/920:25 -
1 stop9h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£184
Tue 24/1113:40 -
1 stop15h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£189
Sat 27/209:54 -
1 stop16h 01m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£199
Wed 9/1209:30 -
1 stop16h 25m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£204
Mon 21/917:00 -
1 stop11h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 31/8£211
Sat 10/1020:25 -
1 stop11h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£215
Thu 5/1117:40 -
1 stop11h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£219
Sat 3/1020:25 -
1 stop12h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£220
Sat 10/1020:25 -
1 stop11h 15m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£221
Tue 1/1217:40 -
1 stop11h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£231
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 4 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 4 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
Fastest return journey
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 4/11
18:35-06:35
Nonstop7h 00m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£240
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 28/2
13:00-09:00
2 stops15h 00m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 5/11
10:27-06:55
1 stop15h 28m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 7/10
12:25-06:45
1 stop13h 20m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 13/10
17:29-12:05
2 stops13h 36m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 4/10
06:15-07:15
2 stops20h 00m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 2/12
12:22-07:15
2 stops13h 53m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 11/10
06:10-06:45
2 stops19h 35m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 21/9
17:27-13:15
2 stops14h 48m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£243
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 12/9
12:29-08:50
2 stops15h 21m
London Heathrow
Wed 31/12
00:00-18:00
Nonstop0h 00m
£280
Flights are sorted by cheapest return flights first.
Deals found on 3/9
Showing 1-10 of 21 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
More
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 £520). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,104). 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 4 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 £631 and £847 in November.The cheapest return price found within the last 5 days was £613 on Iberia (10 Nov–12 Nov).
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 4 September 2026.
The most flights from PHL to LHR are scheduled on a Wednesday (15 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (14 on average).
What’s the top stopover airport for flights from Philadelphia to London Heathrow Airport?
Share of one-stop return flights from Philadelphia to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Boston (BOS) – chosen by Cheapflights users on 78% of one-stop itineraries from Philadelphia to London Heathrow Airport on Cheapflights.
What’s the cheapest stopover airport for flights from Philadelphia to London Heathrow Airport?
Average return fare for one-stop flights from Philadelphia to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same stopover each way.
Dublin (DUB) is the most affordable one-stop option, with an average return flight price of £393.
What’s the fastest stopover option from Philadelphia to London Heathrow Airport?
Shortest average travel time for one-stop one-way flights from Philadelphia to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for one-stop routes: 10h 05m.
Which airport typically offers the quickest stopover for flights from Philadelphia to London Heathrow Airport?
Average stopover duration for one-stop one-way flights from Philadelphia to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Dublin (DUB) offer the fastest connection on this route, with an average stopover time of 1h 54m.
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 4 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 14 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 £642, Delta can have you in London Heathrow Airport from Philadelphia in 11h 49m. Philadelphia and London Heathrow Airport are separated by a distance of 3533 mi.
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 £422 on this airline. An additional option worth looking into is American Airlines, starting at £518. Users have found that British Airways is 43% 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 £663. On average you can expect to pay £905. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £499.
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 £520). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,104). 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 4 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 4 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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