Cheap flights from Philadelphia to London Heathrow Airport from £209
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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
6 Sep — 13 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 14 days in advance, depart on a Saturday or Tuesday and return on a Tuesday
Cheap flight deals from Philadelphia to Heathrow
Enter your travel dates to find the best prices.
Cheapest
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 7 August 2026.
Sat 15/820:55 -
1 stop28h 35m
Wed 26/808:40 -
1 stop16h 21m
Deal found 3/8£627
Wed 11/1113:40 -
1 stop15h 45m
Sun 15/1117:15 -
1 stop21h 17m
Deal found 4/8£628
Thu 12/1110:30 -
1 stop15h 25m
Thu 19/1109:20 -
1 stop28h 00m
Deal found 3/8£630
Sun 15/1109:45 -
1 stop21h 15m
Tue 17/1109:30 -
1 stop11h 35m
Deal found 4/8£637
Sun 6/909:12 -
1 stop16h 18m
Tue 15/908:40 -
1 stop14h 08m
Deal found 4/8£639
Sun 13/1217:05 -
2 stops14h 55m
Tue 15/1213:00 -
2 stops14h 56m
Deal found 4/8£640
Tue 1/909:12 -
1 stop16h 18m
Sat 5/908:40 -
1 stop16h 20m
Deal found 3/8£641
Wed 11/1119:50 -
Nonstop7h 00m
Sun 15/1109:20 -
1 stop13h 12m
Deal found 3/8£641
Sun 1/1115:30 -
1 stop10h 25m
Wed 18/1106:30 -
1 stop12h 35m
Deal found 3/8£643
Wed 18/1119:50 -
Nonstop7h 00m
Wed 25/1107:35 -
1 stop13h 45m
Deal found 3/8£646
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 7 August 2026.
Sun 20/910:42 -
1 stop14h 48m
Mon 5/1008:40 -
1 stop14h 09m
Deal found 2/8£664
Sun 11/1006:00 -
2 stops25h 45m
Fri 23/1008:00 -
2 stops30h 50m
Deal found 3/8£725
Sun 1/1120:12 -
3 stops16h 18m
Sun 8/1116:30 -
2 stops35h 06m
Deal found 4/8£779
Fri 25/922:10 -
Nonstop7h 10m
Mon 28/920:35 -
1 stop22h 10m
Deal found 4/8£780
Sat 19/910:42 -
1 stop14h 48m
Sat 26/908:40 -
1 stop14h 08m
Deal found 7/8£665
Tue 6/1015:57 -
2 stops25h 58m
Tue 13/1011:20 -
2 stops27h 30m
Deal found 3/8£725
Mon 5/1015:57 -
3 stops21h 53m
Tue 13/1019:50 -
3 stops43h 00m
Deal found 2/8£747
Sun 25/1015:30 -
3 stops22h 00m
Sat 31/1019:55 -
2 stops31h 41m
Deal found 7/8£752
Thu 24/910:42 -
2 stops21h 03m
Sun 4/1016:35 -
2 stops34h 29m
Deal found 6/8£755
Thu 22/1015:25 -
2 stops21h 20m
Sun 25/1006:00 -
2 stops31h 39m
Deal found 2/8£759
Mon 5/1015:57 -
3 stops21h 53m
Sun 11/1011:20 -
3 stops27h 30m
Deal found 4/8£785
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 7 August 2026.
Wed 4/1118:35 -
Nonstop7h 00m
Wed 11/1110:35 -
Nonstop8h 15m
Deal found 3/8£670
Wed 4/1118:35 -
Nonstop7h 00m
Wed 25/1113:10 -
Nonstop8h 05m
Deal found 6/8£676
Sun 1/1118:35 -
Nonstop7h 00m
Fri 13/1113:10 -
Nonstop8h 05m
Deal found 2/8£681
Sun 1/1118:35 -
Nonstop7h 00m
Fri 13/1113:10 -
Nonstop8h 05m
Deal found 3/8£687
Wed 4/1118:35 -
Nonstop7h 00m
Wed 25/1110:35 -
Nonstop8h 15m
Deal found 5/8£690
Mon 2/1118:35 -
Nonstop7h 00m
Fri 20/1113:10 -
Nonstop8h 05m
Deal found 3/8£690
Tue 3/1119:50 -
Nonstop7h 00m
Wed 4/1113:10 -
Nonstop8h 05m
Deal found 2/8£691
Wed 4/1118:35 -
Nonstop7h 00m
Mon 9/1110:35 -
Nonstop8h 15m
Deal found 6/8£693
Sun 1/1118:35 -
Nonstop7h 00m
Fri 13/1113:10 -
Nonstop8h 05m
Deal found 2/8£700
Sun 1/1118:35 -
Nonstop7h 00m
Fri 6/1110:35 -
Nonstop8h 15m
Deal found 4/8£702
Sun 6/918:45 -
Nonstop7h 05m
Tue 15/913:00 -
Nonstop8h 00m
Deal found 3/8£703
Last-minute flights from Philadelphia to Heathrow
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated 7 August 2026 and is based on user searches.
Sat 15/820:55 -
1 stop28h 35m
Wed 26/808:40 -
1 stop16h 21m
Deal found 3/8£627
Sat 22/809:00 -
1 stop16h 30m
Thu 27/808:40 -
1 stop16h 21m
Deal found 2/8£641
Tue 1/909:12 -
1 stop16h 18m
Sat 5/908:40 -
1 stop16h 20m
Deal found 3/8£641
Wed 2/920:55 -
1 stop28h 35m
Mon 7/908:40 -
1 stop28h 42m
Deal found 2/8£652
Sun 6/909:12 -
1 stop16h 18m
Tue 15/908:40 -
1 stop14h 08m
Deal found 4/8£639
Thu 10/906:00 -
1 stop19h 30m
Mon 21/908:40 -
2 stops17h 52m
Deal found 2/8£650
Fri 11/910:42 -
1 stop14h 48m
Mon 21/907:30 -
1 stop13h 35m
Deal found 7/8£651
Tue 15/910:42 -
1 stop14h 48m
Wed 30/908:40 -
2 stops17h 52m
Deal found 6/8£652
Thu 17/906:00 -
1 stop19h 30m
Wed 30/908:40 -
1 stop14h 08m
Deal found 5/8£647
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 7 August 2026.
Mon 2/1121:56 -
1 stop31h 29m
Deal found 4/8£209
Thu 1/1007:30 -
2 stops25h 45m
Deal found 5/8£240
Mon 28/910:42 -
1 stop14h 48m
Deal found 4/8£241
Mon 14/910:42 -
1 stop14h 48m
Deal found 3/8£242
Mon 5/1010:42 -
1 stop14h 48m
Deal found 7/8£244
Mon 26/1006:00 -
1 stop20h 55m
Deal found 5/8£250
Mon 10/820:55 -
1 stop28h 35m
Deal found 3/8£252
Fri 2/1018:48 -
1 stop30h 42m
Deal found 7/8£252
Fri 25/917:45 -
3 stops37h 10m
Deal found 6/8£258
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 7 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 858,174 searches. Data last updated 7 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
Sun 20/9
10:42-06:30
1 stop14h 48m
London Heathrow
Mon 5/10
08:40-17:49
1 stop14h 09m
£664
Fastest return journey
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 19/9
10:42-06:30
1 stop14h 48m
London Heathrow
Sat 26/9
08:40-17:48
1 stop14h 08m
£665
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 11/10
06:00-12:45
2 stops25h 45m
London Heathrow
Fri 23/10
08:00-09:50
2 stops30h 50m
£725
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 6/10
15:57-22:55
2 stops25h 58m
London Heathrow
Tue 13/10
11:20-09:50
2 stops27h 30m
£725
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 5/10
15:57-18:50
3 stops21h 53m
London Heathrow
Tue 13/10
19:50-09:50
3 stops43h 00m
£747
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 25/10
15:30-17:30
3 stops22h 00m
London Heathrow
Sat 31/10
19:55-23:36
2 stops31h 41m
£752
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
£755
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 22/10
15:25-17:45
2 stops21h 20m
London Heathrow
Sun 25/10
06:00-09:39
2 stops31h 39m
£759
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 1/11
20:12-17:30
3 stops16h 18m
London Heathrow
Sun 8/11
16:30-22:36
2 stops35h 06m
£779
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Fri 25/9
22:10-10:20
Nonstop7h 10m
London Heathrow
Mon 28/9
20:35-13:45
1 stop22h 10m
£780
Flights are sorted by cheapest return flights first.
Deals found on 3/8
Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
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 13 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 £529). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,101). 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 7 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 £431 and £828 in November.The cheapest return price found within the last 5 days was £628 on British Airways (11 Nov–15 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 7 August 2026.
The most flights from PHL to LHR are scheduled on a Monday (15 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (10 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 £394.
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 7 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 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 £664, JetBlue 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 £424 on this airline. An additional option worth looking into is American Airlines, starting at £520. 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 (73%), American Airlines (73%) or Finnair (73%) 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 £546. On average you can expect to pay £949. The most popular route, (Philadelphia - London Heathrow), can usually be booked for £560.
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 £529). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of £1,101). 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 7 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 858,174 searches. Data last updated 7 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.
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.