$301+ Cheap flights from Philadelphia (PHL) to Heathrow (LHR)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Nov 13 — Nov 201
Round-trip
1 adult, Economy
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Find cheap flights from Philadelphia to Heathrow with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 Wednesday or Tuesday and return on a Monday
Cheap flight deals from Philadelphia to Heathrow
Cheapest
Best
Last-minute
One-way
Cheapest flights from Philadelphia to HeathrowExplore 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 October 14, 2026.
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 October 14, 2026.
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:40 pm -
1 stop9h 25m
Wed 11/187:50 am -
1 stop13h 20m
Deal found 10/13![Aer Lingus logo]()
$825
This Iberia deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:35 pm -
Nonstop7h 00m
Sun 11/2210:35 am -
Nonstop8h 10m
Deal found 10/12![Iberia logo]()
$827
This Cheapflightsfares deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:27 am -
1 stop15h 28m
Mon 11/239:20 am -
1 stop14h 34m
Deal found 10/13![JetBlue logo]()
$829
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:40 pm -
1 stop9h 25m
Tue 11/38:50 am -
1 stop12h 20m
Deal found 10/13![Aer Lingus logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:40 pm -
1 stop10h 25m
Wed 11/117:50 am -
1 stop13h 20m
Deal found 10/14![Aer Lingus logo]()
$832
This Expedia deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:33 pm -
1 stop30h 22m
Sun 12/68:45 pm -
1 stop24h 25m
Deal found 10/14![Multiple Airlines logo]()
$835
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/195:40 pm -
1 stop10h 25m
Tue 11/248:50 am -
1 stop12h 20m
Deal found 10/14![Aer Lingus logo]()
$843
This Iberia deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:35 pm -
Nonstop7h 00m
Mon 12/77:30 am -
1 stop13h 05m
Deal found 10/12![Iberia logo]()
$845
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/284:39 pm -
2 stops21h 16m
Sat 12/56:00 am -
2 stops23h 52m
Deal found 10/14![Multiple Airlines logo]()
$846
This Cheapflightsfares deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:30 am -
1 stop16h 25m
Sun 12/69:20 am -
1 stop14h 23m
Deal found 10/13![JetBlue logo]()
$848
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:37 am -
3 stops26h 53m
Wed 11/256:40 am -
2 stops22h 50m
Deal found 10/11![Multiple Airlines logo]()
$849
Best flights from Philadelphia to HeathrowDiscover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 14, 2026.
Discover carefully curated flight deals from Philadelphia to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 14, 2026.
This JetBlue deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/259:54 am -
1 stop16h 01m
Sat 2/279:20 am -
1 stop15h 04m
Deal found 10/13![JetBlue logo]()
$906
This United deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/275:05 pm -
1 stop32h 25m
Thu 3/46:50 am -
2 stops12h 52m
Deal found 10/14![Multiple Airlines logo]()
$921
This Travelocity deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/277:50 pm -
Nonstop7h 00m
Thu 3/47:30 am -
1 stop13h 20m
Deal found 10/14![Iberia logo]()
$953
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/231:25 pm -
2 stops23h 05m
Mon 12/76:00 am -
2 stops31h 39m
Deal found 10/13![TAP AIR PORTUGAL logo]()
$963
This United Airlines deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/103:05 pm -
1 stop14h 45m
Mon 1/185:30 pm -
2 stops27h 51m
Deal found 10/12![United Airlines logo]()
$1,025
This Delta deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/211:50 am -
1 stop14h 15m
Sun 12/66:30 am -
2 stops18h 00m
Deal found 10/14![Delta logo]()
$1,045
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/209:30 am -
2 stops31h 05m
Sun 1/246:00 am -
3 stops31h 37m
Deal found 10/13![TAP AIR PORTUGAL logo]()
$978
This Finnair deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/57:35 pm -
Nonstop7h 15m
Tue 1/126:30 am -
1 stop12h 35m
Deal found 10/13![Multiple Airlines logo]()
$985
This JetBlue deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/219:10 am -
1 stop16h 45m
Tue 12/19:20 am -
1 stop14h 23m
Deal found 10/13![JetBlue logo]()
$1,036
This United Airlines deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/147:40 pm -
1 stop30h 00m
Mon 1/185:30 pm -
2 stops27h 51m
Deal found 10/12![United Airlines logo]()
$1,036
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/87:33 pm -
3 stops16h 57m
Sun 12/137:55 pm -
2 stops27h 48m
Deal found 10/11![Multiple Airlines logo]()
$1,008
This TAP AIR PORTUGAL deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:00 am -
2 stops24h 40m
Mon 11/166:30 pm -
3 stops44h 16m
Deal found 10/12![Multiple Airlines logo]()
$1,021
Last-minute flights from Philadelphia to HeathrowDiscover last-minute flight deals from Philadelphia to Heathrow. Data last updated October 14, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated October 14, 2026 and is based on user searches.
This deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:26 pm -
1 stop10h 04m
Sat 10/178:40 am -
1 stop14h 48m
Deal found 10/12![JetBlue logo]()
$854
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:40 pm -
1 stop9h 25m
Tue 11/38:50 am -
1 stop12h 20m
Deal found 10/13![Aer Lingus logo]()
$830
This Kiwi.com deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/45:40 pm -
1 stop10h 25m
Wed 11/117:50 am -
1 stop13h 20m
Deal found 10/14![Aer Lingus logo]()
$832
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:40 pm -
1 stop9h 25m
Wed 11/187:50 am -
1 stop13h 20m
Deal found 10/13![Aer Lingus logo]()
$825
This Cheapflightsfares deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
1 stop18h 55m
Thu 11/199:20 am -
1 stop14h 34m
Deal found 10/13![JetBlue logo]()
$848
This The Travel House deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure The Travel House is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
1 stop18h 55m
Tue 11/179:20 am -
1 stop29h 17m
Deal found 10/11![JetBlue logo]()
$850
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:40 pm -
1 stop9h 25m
Fri 11/208:50 am -
1 stop12h 20m
Deal found 10/14![Aer Lingus logo]()
$852
This Iberia deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:35 pm -
Nonstop7h 00m
Sun 11/2210:35 am -
Nonstop8h 10m
Deal found 10/12![Iberia logo]()
$827
This Cheapflightsfares deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1710:27 am -
1 stop15h 28m
Mon 11/239:20 am -
1 stop14h 34m
Deal found 10/13![JetBlue logo]()
$829
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1810:37 am -
3 stops26h 53m
Wed 11/256:40 am -
2 stops22h 50m
Deal found 10/11![Multiple Airlines logo]()
$849
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/195:40 pm -
1 stop10h 25m
Tue 11/248:50 am -
1 stop12h 20m
Deal found 10/14![Aer Lingus logo]()
$843
This Mytrip deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/284:39 pm -
2 stops21h 16m
Sat 12/56:00 am -
2 stops23h 52m
Deal found 10/14![Multiple Airlines logo]()
$846
One-way flights from Philadelphia to HeathrowSearch for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated October 14, 2026.
This KAYAK deal was found by Cheapflights users on 10/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/151:37 pm -
1 stop12h 38m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/12![British Airways logo]()
$301
This Cheapflightsfares deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:00 am -
1 stop18h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![JetBlue logo]()
$320
This oojo deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/279:54 am -
1 stop16h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![JetBlue logo]()
$321
This Cheapflightsfares deal was found by Cheapflights users on 10/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/109:30 am -
1 stop16h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/9![JetBlue logo]()
$324
This JetBlue deal was found by Cheapflights users on 10/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/710:27 am -
1 stop15h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/14![JetBlue logo]()
$329
This JetBlue deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/119:30 am -
1 stop16h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![JetBlue logo]()
$333
This JetBlue deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 1/319:30 am -
1 stop16h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![JetBlue logo]()
$334
This Expedia deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/269:10 pm -
1 stop9h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![British Airways logo]()
$338
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/19:15 am -
2 stops30h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Air Canada logo]()
$339
This Expedia deal was found by Cheapflights users on 10/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1210:05 pm -
Nonstop7h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/10![Iberia logo]()
$340
This Mytrip deal was found by Cheapflights users on 10/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/273:20 pm -
2 stops24h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/11![Air Canada logo]()
$341
This Mytrip deal was found by Cheapflights users on 10/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/29:15 am -
2 stops16h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Air Canada logo]()
$343
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 October 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $817 (FlightHub) |
One-way from | $301 (KAYAK) |
Popular in | June |
Cheapest in | February |
Average price | $1,096 |
Good round-trip deal | $784 or less |
Good one-way deal | $456 or less |
Cheapflights Fare Finder
Customize 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 October 14, 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
Cheapest round-trip
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 1/12
9:30 am-6:55 am
1 stop16h 25m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$333
Quickest round-trip
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 4/11
6:45 pm-6:50 am
Nonstop7h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$350
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 4/12
6:45 pm-6:50 am
Nonstop7h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$350
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 3/10
1:00 pm-9:00 am
2 stops15h 00m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$354
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 1/27
3:05 pm-9:10 am
2 stops13h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$354
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 4/10
6:45 pm-6:50 am
Nonstop7h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$400
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 12/15
9:30 am-6:55 am
1 stop16h 25m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$477
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 11/24
1:25 pm-5:30 pm
3 stops23h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$617
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 2/25
9:54 am-6:55 am
1 stop16h 01m
London Heathrow
Sat 2/27
9:20 am-7:24 pm
1 stop15h 04m
$906
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 2/27
5:05 pm-6:30 am
1 stop32h 25m
London Heathrow
Thu 3/4
6:50 am-2:42 pm
2 stops12h 52m
$921
Showing 1-10 of 20 resultsSorted by cheapest first
Compare providers for flights from Philadelphia to Heathrow
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Heathrow in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Philadelphia-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Philadelphia-London Heathrow Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Philadelphia-London Heathrow Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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 round-trip 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
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How far ahead should I book a flight from Philadelphia to London Heathrow Airport?
Booking 76 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 $718). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,491). 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 October 14, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to London Heathrow Airport as you normally would.
What’s the top layover airport for flights from Philadelphia to London Heathrow Airport?
Share of 1-stop round-trip flights from Philadelphia to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Dublin (DUB) – chosen by Cheapflights users on 91% of 1-stop itineraries from Philadelphia to London Heathrow Airport on Cheapflights.
What’s the cheapest layover airport for flights from Philadelphia to London Heathrow Airport?
Average round-trip fare for 1-stop flights from Philadelphia to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Dublin (DUB) is the most affordable 1-stop option, with an average round-trip price of $806.
What’s the fastest layover option from Philadelphia to London Heathrow Airport?
Shortest average travel time for 1-stop one-way flights from Philadelphia to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Dublin (DUB) have the shortest average one-way travel time for 1-stop routes: 9h 36m.
Which airport typically offers the quickest layover for flights from Philadelphia to London Heathrow Airport?
Average layover duration for 1-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 layover time of 1h 54m.
The best insider tips for Philadelphia to London Heathrow Airport flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to London Heathrow Airport trip
Our travel experts
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 October 14, 2026.
Peruse reviews from past customers who have flown with Finnair,Aer Lingus, andAmerican Airlines from Philadelphia to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Boarding
7.6
Crew
8.2
Entertainment
6.9
Comfort
7.4
Food
6.7
Overall
7.6
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
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.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
Dorking
Gatwick
Hounslow
Wembley
Harrow
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Winchester
Croydon
Chipping Norton
Kingston upon Thames
Slough
Eastbourne
Stansted
Sutton
Luton
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Other flights to Heathrow
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 14, 2026.
Philadelphia and Heathrow flights
Browse other Philadelphia and Heathrow flight options. Last updated on October 14, 2026.
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Browse through other flights departing from Philadelphia. Flights are based on user searches made on Cheapflights and were last updated on October 14, 2026.
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Top 6 airlines flying from Philadelphia to Heathrow
Discover the top 6 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 October 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$581 | Average$1,101 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$592 | Average$1,073 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$609 | Average$908 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$631 | Average$1,096 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$640 | Average$753 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$651 | Average$1,075 | FlexibilityNo cancel fee | On-time77% |