Cheap flights from Philadelphia to London Heathrow Airport from £240
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 25/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
18 Sep — 25 Sep1
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 27 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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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 19 August 2026.
Tue 24/1115:35 -
1 stop13h 50m
Tue 1/1217:15 -
1 stop21h 03m
Deal found 15/8£623
Sun 1/1117:30 -
1 stop10h 35m
Thu 19/1118:00 -
2 stops27h 00m
Deal found 14/8£624
Wed 2/1210:30 -
1 stop17h 35m
Sun 6/1217:15 -
1 stop19h 38m
Deal found 14/8£625
Wed 2/1210:30 -
1 stop17h 35m
Mon 7/1217:15 -
1 stop19h 38m
Deal found 19/8£625
Wed 18/1115:35 -
1 stop13h 50m
Mon 23/1117:15 -
1 stop19h 39m
Deal found 17/8£628
Tue 17/1110:30 -
1 stop17h 35m
Sun 22/1117:15 -
1 stop19h 39m
Deal found 16/8£629
Fri 4/1215:20 -
1 stop10h 50m
Sun 6/1206:30 -
1 stop14h 35m
Deal found 16/8£634
Sun 13/1217:40 -
1 stop14h 10m
Tue 15/1206:35 -
2 stops14h 30m
Deal found 18/8£636
Mon 14/906:00 -
1 stop19h 30m
Tue 22/908:40 -
1 stop14h 08m
Deal found 17/8£637
Wed 14/1015:25 -
1 stop10h 05m
Wed 28/1006:30 -
1 stop12h 20m
Deal found 17/8£641
Wed 18/1119:50 -
Nonstop7h 00m
Tue 24/1106:05 -
1 stop15h 15m
Deal found 14/8£642
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 19 August 2026.
Tue 24/1113:25 -
3 stops27h 10m
Tue 1/1206:00 -
2 stops17h 43m
Deal found 15/8£710
Wed 30/910:42 -
1 stop14h 48m
Mon 19/1008:40 -
1 stop14h 19m
Deal found 17/8£711
Mon 21/918:45 -
Nonstop7h 05m
Thu 1/1008:15 -
1 stop10h 30m
Deal found 16/8£737
Wed 16/910:05 -
1 stop15h 25m
Sun 20/906:50 -
2 stops17h 04m
Deal found 18/8£772
Mon 5/1010:42 -
1 stop14h 48m
Fri 16/1008:40 -
1 stop14h 19m
Deal found 14/8£712
Thu 29/1018:30 -
2 stops23h 05m
Sat 7/1118:30 -
2 stops33h 06m
Deal found 14/8£728
Mon 5/1015:57 -
3 stops25h 03m
Wed 14/1008:00 -
3 stops30h 50m
Deal found 15/8£742
Sun 27/910:42 -
1 stop14h 48m
Sat 10/1008:40 -
1 stop14h 19m
Deal found 18/8£770
Tue 6/1015:57 -
2 stops20h 48m
Mon 19/1008:00 -
3 stops30h 50m
Deal found 18/8£745
Thu 24/910:42 -
2 stops21h 03m
Sun 4/1016:35 -
2 stops34h 29m
Deal found 16/8£750
Fri 2/1015:57 -
2 stops20h 48m
Wed 7/1011:20 -
3 stops27h 30m
Deal found 18/8£768
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 19 August 2026.
Wed 18/1119:50 -
Nonstop7h 00m
Tue 24/1113:10 -
Nonstop8h 05m
Deal found 14/8£666
Tue 17/1118:35 -
Nonstop7h 00m
Fri 20/1113:10 -
Nonstop8h 05m
Deal found 16/8£678
Tue 1/1218:35 -
Nonstop7h 00m
Thu 10/1213:10 -
Nonstop8h 05m
Deal found 14/8£678
Wed 10/218:35 -
Nonstop7h 00m
Tue 16/213:10 -
Nonstop8h 05m
Deal found 18/8£685
Mon 16/1119:50 -
Nonstop7h 00m
Fri 20/1113:10 -
Nonstop8h 05m
Deal found 15/8£686
Mon 23/1119:50 -
Nonstop7h 00m
Fri 27/1110:35 -
Nonstop8h 15m
Deal found 19/8£687
Wed 18/1118:35 -
Nonstop7h 00m
Mon 23/1110:35 -
Nonstop8h 15m
Deal found 14/8£688
Wed 18/1119:50 -
Nonstop7h 00m
Mon 23/1113:10 -
Nonstop8h 05m
Deal found 17/8£689
Wed 18/1119:50 -
Nonstop7h 00m
Mon 30/1113:10 -
Nonstop8h 05m
Deal found 18/8£690
Mon 18/118:35 -
Nonstop7h 00m
Tue 26/113:10 -
Nonstop8h 05m
Deal found 17/8£693
Wed 20/118:35 -
Nonstop7h 00m
Mon 25/113:10 -
Nonstop8h 05m
Deal found 15/8£695
Wed 13/119:50 -
Nonstop7h 00m
Mon 18/113:10 -
Nonstop8h 05m
Deal found 18/8£697
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 19 August 2026 and is based on user searches.
Mon 24/809:12 -
2 stops20h 08m
Thu 10/906:00 -
2 stops32h 31m
Deal found 15/8£747
Mon 24/809:12 -
1 stop16h 18m
Thu 10/908:40 -
1 stop14h 08m
Deal found 15/8£760
Mon 24/809:12 -
1 stop16h 18m
Thu 27/808:40 -
1 stop16h 21m
Deal found 19/8£799
Tue 25/813:39 -
1 stop15h 01m
Tue 1/917:05 -
1 stop19h 35m
Deal found 17/8£765
Tue 25/820:25 -
1 stop9h 45m
Thu 3/908:50 -
1 stop15h 05m
Deal found 17/8£776
Wed 26/813:39 -
1 stop15h 01m
Tue 1/917:05 -
1 stop19h 35m
Deal found 15/8£749
Wed 26/809:12 -
1 stop16h 18m
Sun 13/908:40 -
1 stop14h 08m
Deal found 15/8£798
Wed 26/816:20 -
2 stops13h 50m
Tue 1/921:10 -
2 stops23h 31m
Deal found 17/8£800
Thu 27/809:12 -
1 stop16h 18m
Mon 31/808:40 -
1 stop16h 21m
Deal found 14/8£767
Sat 29/809:00 -
1 stop16h 30m
Sun 13/908:40 -
1 stop14h 08m
Deal found 16/8£777
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 19 August 2026.
Mon 26/1010:30 -
1 stop16h 25m
Deal found 14/8£240
Sat 6/208:40 -
1 stop17h 15m
Deal found 14/8£242
Mon 16/1115:30 -
1 stop10h 25m
Deal found 19/8£242
Wed 2/1209:30 -
1 stop16h 25m
Deal found 16/8£243
Wed 28/1006:00 -
1 stop20h 55m
Deal found 19/8£244
Mon 15/215:00 -
1 stop10h 55m
Deal found 17/8£245
Sat 24/1006:00 -
1 stop20h 55m
Deal found 16/8£248
Sat 19/918:48 -
1 stop30h 42m
Deal found 19/8£250
Fri 27/1119:17 -
1 stop30h 38m
Deal found 17/8£250
Tue 1/1219:42 -
1 stop30h 13m
Deal found 16/8£253
Wed 2/1219:50 -
Nonstop7h 00m
Deal found 14/8£254
Tue 1/1218:35 -
Nonstop7h 00m
Deal found 16/8£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 19 August 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 19 August 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
Tue 24/11
13:25-21:35
3 stops27h 10m
London Heathrow
Tue 1/12
06:00-18:43
2 stops17h 43m
£710
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 30/9
10:42-06:30
1 stop14h 48m
London Heathrow
Mon 19/10
08:40-17:59
1 stop14h 19m
£711
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 5/10
10:42-06:30
1 stop14h 48m
London Heathrow
Fri 16/10
08:40-17:59
1 stop14h 19m
£712
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 29/10
18:30-21:35
2 stops23h 05m
London Heathrow
Sat 7/11
18:30-22:36
2 stops33h 06m
£728
Fastest return journey
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 21/9
18:45-06:50
Nonstop7h 05m
London Heathrow
Thu 1/10
08:15-13:45
1 stop10h 30m
£737
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 5/10
15:57-22:00
3 stops25h 03m
London Heathrow
Wed 14/10
08:00-09:50
3 stops30h 50m
£742
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 6/10
15:57-17:45
2 stops20h 48m
London Heathrow
Mon 19/10
08:00-09:50
3 stops30h 50m
£745
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 24/9
10:42-12:45
2 stops21h 03m
London Heathrow
Sun 4/10
16:35-22:04
2 stops34h 29m
£750
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Fri 2/10
15:57-17:45
2 stops20h 48m
London Heathrow
Wed 7/10
11:20-09:50
3 stops27h 30m
£768
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 27/9
10:42-06:30
1 stop14h 48m
London Heathrow
Sat 10/10
08:40-17:59
1 stop14h 19m
£770
Flights are sorted by cheapest return flights first.
Deals found on 18/8
Showing 1-10 of 20 resultsSorted by cheapest first
1
2
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 26 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 £525). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,095). 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 19 August 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 typical for this route at the moment.
Philadelphia to London Heathrow Airport flights typically cost between £555 and £837 in November.The cheapest return price found within the last 5 days was £623 on British Airways (24 Nov–1 Dec).
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 19 August 2026.
The most flights from PHL to LHR 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).
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 £391.
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 19 August 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 15 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 £711, TAP AIR PORTUGAL can have you in London Heathrow Airport from Philadelphia in 14h 48m. 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 £421 on this airline. An additional option worth looking into is American Airlines, starting at £516. Users have found that British Airways is 41% cheaper than the other options available to this destination.
What are the most reliable airlines from Philadelphia to London Heathrow Airport?
Consider Malaysia Airlines (77%), American Airlines (75%) or Finnair (75%) 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 £542. On average you can expect to pay £934. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £572.
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 £525). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,095). 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 19 August 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 19 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 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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