$243+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — LHR
Oct 6 — Oct 131
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
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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 September 6, 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 September 6, 2026.
This Expedia deal was found by Cheapflights users on 9/3. 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 11/104:25 pm -
1 stop9h 35m
Thu 11/127:30 am -
1 stop13h 05m
Deal found 9/3![Iberia logo]()
$829
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Thu 11/55:40 pm -
1 stop10h 25m
Mon 11/96:35 pm -
2 stops26h 35m
Deal found 9/3![Multiple Airlines logo]()
$831
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/168:25 pm -
1 stop11h 15m
Tue 10/278:45 am -
2 stops36h 25m
Deal found 9/4![Multiple Airlines logo]()
$832
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Tue 12/155:40 pm -
1 stop9h 25m
Tue 12/229:50 am -
1 stop11h 20m
Deal found 9/3![Aer Lingus logo]()
$834
This Booking.com deal was found by Cheapflights users on 9/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:25 pm -
1 stop11h 15m
Sun 10/111:25 pm -
1 stop10h 30m
Deal found 9/3![Aer Lingus logo]()
$839
This Expedia deal was found by Cheapflights users on 9/3. 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 11/34:25 pm -
2 stops14h 40m
Tue 11/107:20 am -
1 stop12h 40m
Deal found 9/3![Iberia logo]()
$840
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:25 pm -
1 stop11h 15m
Sun 10/119:50 am -
1 stop14h 05m
Deal found 9/4![Aer Lingus logo]()
$841
This Kiwi.com deal was found by Cheapflights users on 9/5. 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 stop9h 25m
Wed 11/119:50 am -
1 stop11h 20m
Deal found 9/5![Aer Lingus logo]()
$842
This FlightHub deal was found by Cheapflights users on 9/4. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:40 pm -
1 stop11h 30m
Fri 11/139:50 am -
1 stop11h 20m
Deal found 9/4![British Airways logo]()
$843
This Justfly.com deal was found by Cheapflights users on 9/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/85:40 pm -
1 stop9h 25m
Tue 11/179:50 am -
1 stop11h 20m
Deal found 9/3![Aer Lingus logo]()
$844
This Finnair deal was found by Cheapflights users on 9/3. 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.
Wed 10/2110:10 pm -
Nonstop7h 10m
Wed 11/116:30 am -
1 stop12h 30m
Deal found 9/3![Multiple Airlines logo]()
$845
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 September 6, 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 September 6, 2026.
This Finnair deal was found by Cheapflights users on 9/3. 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.
Wed 11/256:35 pm -
Nonstop7h 00m
Wed 12/96:30 am -
1 stop12h 35m
Deal found 9/3![Multiple Airlines logo]()
$845
This Delta deal was found by Cheapflights users on 9/2. 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.
Tue 10/62:26 pm -
1 stop11h 49m
Tue 10/138:40 am -
2 stops18h 27m
Deal found 9/2![Delta logo]()
$868
This British Airways deal was found by Cheapflights users on 9/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/56:35 pm -
Nonstop7h 00m
Wed 3/101:10 pm -
Nonstop8h 05m
Deal found 9/5![British Airways logo]()
$991
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/4. 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.
Sun 11/15:58 pm -
3 stops22h 37m
Sun 11/158:15 am -
3 stops41h 56m
Deal found 9/4![TAP AIR PORTUGAL logo]()
$1,004
This United Airlines deal was found by Cheapflights users on 9/4. 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 10/107:30 pm -
1 stop30h 25m
Fri 10/232:05 pm -
1 stop29h 42m
Deal found 9/4![United Airlines logo]()
$1,009
This Scandinavian Airlines deal was found by Cheapflights users on 9/5. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/612:25 pm -
2 stops28h 15m
Wed 10/217:05 am -
3 stops20h 02m
Deal found 9/5![Scandinavian Airlines logo]()
$1,055
This Delta deal was found by Cheapflights users on 9/3. 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.
Thu 10/16:15 am -
1 stop19h 55m
Tue 10/69:55 am -
2 stops17h 27m
Deal found 9/3![Delta logo]()
$918
This Finnair deal was found by Cheapflights users on 9/5. 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.
Wed 11/256:35 pm -
Nonstop7h 00m
Thu 12/36:30 am -
1 stop12h 35m
Deal found 9/5![Multiple Airlines logo]()
$977
This British Airways deal was found by Cheapflights users on 9/5. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/126:35 pm -
Nonstop7h 00m
Wed 2/171:10 pm -
Nonstop8h 05m
Deal found 9/5![British Airways logo]()
$991
This Delta deal was found by Cheapflights users on 9/1. 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.
Fri 9/186:00 am -
1 stop22h 15m
Thu 10/16:30 am -
2 stops17h 49m
Deal found 9/1![Delta logo]()
$927
This Delta deal was found by Cheapflights users on 9/2. 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.
Fri 9/251:24 pm -
2 stops13h 31m
Fri 10/1611:15 am -
1 stop18h 41m
Deal found 9/2![Delta logo]()
$952
This Delta deal was found by Cheapflights users on 9/2. 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.
Sat 9/267:10 am -
1 stop19h 05m
Mon 10/511:45 am -
2 stops15h 36m
Deal found 9/2![Delta logo]()
$968
Last-minute flights from Philadelphia to HeathrowDiscover last-minute flight deals from Philadelphia to Heathrow. Data last updated September 6, 2026 and is based on user searches.
Discover last-minute flight deals from Philadelphia to Heathrow. Data last updated September 6, 2026 and is based on user searches.
This Iberia deal was found by Cheapflights users on 9/2. 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.
Sun 9/67:35 pm -
Nonstop7h 15m
Wed 9/96:15 am -
1 stop16h 30m
Deal found 9/2![Iberia logo]()
$850
This Iberia deal was found by Cheapflights users on 9/4. 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 9/87:35 pm -
Nonstop7h 15m
Tue 9/227:50 am -
1 stop14h 55m
Deal found 9/4![Iberia logo]()
$849
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:25 pm -
1 stop11h 15m
Sun 10/119:50 am -
1 stop14h 05m
Deal found 9/4![Aer Lingus logo]()
$841
This Expedia deal was found by Cheapflights users on 9/4. 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.
Sun 10/43:20 pm -
1 stop10h 25m
Fri 10/911:45 am -
2 stops15h 22m
Deal found 9/4![KLM logo]()
$858
This Booking.com deal was found by Cheapflights users on 9/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/78:25 pm -
1 stop11h 15m
Sun 10/111:25 pm -
1 stop10h 30m
Deal found 9/3![Aer Lingus logo]()
$839
This Orbitz deal was found by Cheapflights users on 9/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/128:25 pm -
1 stop12h 05m
Wed 10/2112:00 pm -
1 stop11h 55m
Deal found 9/2![Aer Lingus logo]()
$847
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/148:25 pm -
1 stop11h 15m
Wed 10/211:25 pm -
1 stop10h 30m
Deal found 9/3![Aer Lingus logo]()
$846
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Fri 10/168:25 pm -
1 stop11h 15m
Tue 10/278:45 am -
2 stops36h 25m
Deal found 9/4![Multiple Airlines logo]()
$832
This Finnair deal was found by Cheapflights users on 9/3. 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.
Wed 10/2110:10 pm -
Nonstop7h 10m
Wed 11/116:30 am -
1 stop12h 30m
Deal found 9/3![Multiple Airlines logo]()
$845
This The Travel House deal was found by Cheapflights users on 9/4. 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.
Sat 10/2410:22 am -
1 stop16h 33m
Sat 11/79:20 am -
1 stop29h 17m
Deal found 9/4![JetBlue logo]()
$844
This Kiwi.com deal was found by Cheapflights users on 9/5. 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.
Sun 10/256:40 pm -
1 stop9h 25m
Sun 11/16:35 pm -
2 stops26h 35m
Deal found 9/5![Multiple Airlines logo]()
$856
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 September 6, 2026.
Search for one-way flight options from Philadelphia to Heathrow. Find affordable one-way fares based on user searches. Data last updated September 6, 2026.
This Booking.com deal was found by Cheapflights users on 9/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/48:25 pm -
1 stop11h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Aer Lingus logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Sun 10/256:40 pm -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Aer Lingus logo]()
$246
This Justfly.com deal was found by Cheapflights users on 9/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:40 pm -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![British Airways logo]()
$247
This Justfly.com deal was found by Cheapflights users on 9/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:25 pm -
1 stop9h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![British Airways logo]()
$249
This KAYAK deal was found by Cheapflights users on 9/3. 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.
Tue 11/241:40 pm -
1 stop15h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![British Airways logo]()
$256
This JetBlue deal was found by Cheapflights users on 9/3. 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 2/279:54 am -
1 stop16h 01m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![JetBlue logo]()
$269
This JetBlue deal was found by Cheapflights users on 9/3. 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.
Wed 12/99:30 am -
1 stop16h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![JetBlue logo]()
$276
This Booking.com deal was found by Cheapflights users on 9/3. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:25 pm -
1 stop11h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Aer Lingus logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 9/4. 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.
Thu 10/296:40 pm -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Aer Lingus logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Sat 10/38:25 pm -
1 stop12h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Aer Lingus logo]()
$298
This Justfly.com deal was found by Cheapflights users on 9/3. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/108:25 pm -
1 stop11h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![British Airways logo]()
$299
This Booking.com deal was found by Cheapflights users on 9/4. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/15:40 pm -
1 stop11h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Aer Lingus logo]()
$313
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 September 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $829 (Expedia) |
One-way from | $243 (Booking.com) |
Popular in | June |
Cheapest in | February |
Average price | $1,010 |
Good round-trip deal | $1,012 or less |
Good one-way deal | $453 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 September 6, 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
Wed 9/30
6:45 pm-6:50 am
Nonstop7h 05m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$325
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Tue 9/29
9:35 am-6:45 am
2 stops16h 10m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$329
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 10/26
5:29 pm-11:40 am
2 stops14h 11m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$329
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 10/7
5:29 pm-12:05 pm
2 stops13h 36m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$329
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Wed 12/2
12:22 pm-7:15 am
2 stops13h 53m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$329
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 10/18
12:32 pm-7:40 am
2 stops14h 08m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$338
Quickest round-trip
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sun 12/6
6:35 pm-6:35 am
Nonstop7h 00m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$350
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Mon 12/28
4:58 pm-9:20 pm
2 stops23h 22m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$354
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Sat 1/2
9:15 am-9:00 pm
2 stops30h 45m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$358
PhiladelphiaLondon
PHL Philadelphia - LHR London Heathrow
PHLLHR
Philadelphia
Thu 10/1
6:00 am-6:45 am
1 stop19h 45m
London Heathrow
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$379
Showing 1-10 of 23 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 September.
| 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 $704). Flying from Philadelphia to London Heathrow Airport in June is currently the most expensive (average of $1,487). 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 September 6, 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 September 6, 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.
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
Reviews
1 / 20
8.0
ExcellentRonald,Sep 2023
SEA - LHR
Food
6.7
Overall
7.6
Comfort
7.4
Crew
8.2
Entertainment
6.9
Boarding
7.7
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
Winchester
Eastleigh
Gatwick
Hounslow
Harrow
Wembley
Southend-on-Sea
Basingstoke
Watford
Northampton
Dartford
Croydon
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
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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 September 6, 2026.
Philadelphia and Heathrow flights
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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 September 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$527 | Average$988 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$552 | Average$1,016 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$584 | Average$1,045 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$609 | Average$898 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$616 | Average$1,050 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$640 | Average$752 | FlexibilityNo cancel fee | On-time62% |