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Flights from Philadelphia to London

Search for direct flights from Philadelphia to London in the next 3 months. Based on Trip.com's latest 7-day flight data, one-way direct flights start at US$373, and round-trip direct flights start at US$641.

      • Cheapest nonstop
        PHL 19:50
        7h
        Nonstop
        LHR 07:50
        Philadelphia - London | Tue, Feb 10 | American Airlines
        LHR 10:15
        8h
        Nonstop
        PHL 13:15
        London - Philadelphia | Mon, Feb 16 | American Airlines
        US$641 US$727
        12% off
        12% off
        US$727 US$641
      • PHL 19:50
        7h
        Nonstop
        LHR 07:50
        Philadelphia - London | Tue, Feb 10 | Finnair
        LHR 10:15
        8h
        Nonstop
        PHL 13:15
        London - Philadelphia | Mon, Feb 16 | Finnair
        US$647 US$727
        11% off
        11% off
        US$727 US$647
      • PHL 16:45
        9h 15m
        1 stop
        LHR 07:00
        Philadelphia - London | Tue, Feb 10 | British Airways
        LHR 20:45
        22h 10m
        1 stop
        PHL 13:55
        London - Philadelphia | Mon, Feb 16 | British Airways
        US$568 US$727
        22% off
        22% off
        US$727 US$568
      • PHL 16:43
        10h 17m
        1 stop
        LHR 07:00
        Philadelphia - London | Wed, Mar 11 | British Airways
        LHR 08:50
        12h 10m
        1 stop
        PHL 17:00
        London - Philadelphia | Tue, Mar 17 | British Airways
        US$579
        20% off
        US$727 US$579
      • PHL 10:52
        15h 38m
        1 stop
        LHR 06:30
        Philadelphia - London | Mon, Mar 16 | British Airways
        LHR 17:45
        27h 15m
        1 stop
        PHL 17:00
        London - Philadelphia | Mon, Mar 23 | British Airways
        US$582
        20% off
        US$727 US$582
      • PHL 13:46
        13h 14m
        1 stop
        LHR 07:00
        Philadelphia - London | Wed, Mar 11 | Iberia
        LGW 21:05
        22h
        1 stop
        PHL 15:05
        London - Philadelphia | Wed, Mar 18 | Iberia
        US$585
        20% off
        US$727 US$585
      • PHL 20:40
        7h 10m
        Nonstop
        LHR 07:50
        Philadelphia - London | Mon, Mar 16 | Iberia
        LHR 20:50
        22h 15m
        1 stop
        PHL 15:05
        London - Philadelphia | Mon, Mar 23 | Iberia
        US$587
        19% off
        US$727 US$587
      • PHL 16:43
        10h 17m
        1 stop
        LHR 07:00
        Philadelphia - London | Wed, Mar 11 | American Airlines
        LHR 07:50
        11h 5m
        1 stop
        PHL 14:55
        London - Philadelphia | Tue, Mar 17 | American Airlines
        US$596
        18% off
        US$727 US$596
      • PHL 15:30
        11h 40m
        1 stop
        LHR 07:10
        Philadelphia - London | Wed, Mar 11 | Air Canada
        LHR 13:25
        29h 22m
        1 stop
        PHL 14:47
        London - Philadelphia | Wed, Mar 18 | Air Canada
        US$602
        17% off
        US$727 US$602
      • PHL 10:35
        16h 5m
        1 stop
        LHR 06:40
        Philadelphia - London | Wed, Mar 11 | United Airlines
        LHR 13:25
        29h 22m
        1 stop
        PHL 14:47
        London - Philadelphia | Wed, Mar 18 | United Airlines
        US$603
        17% off
        US$727 US$603
      • PHL 20:50
        12h 35m
        1 stop
        LHR 14:25
        Philadelphia - London | Thu, Mar 5 | British Airways
        LHR 08:50
        12h 10m
        1 stop
        PHL 17:00
        London - Philadelphia | Thu, Mar 12 | British Airways
        US$611
        16% off
        US$727 US$611
      • PHL 16:45
        9h 15m
        1 stop
        LHR 07:00
        Philadelphia - London | Fri, Mar 6 | British Airways
        LHR 07:50
        11h 5m
        1 stop
        PHL 14:55
        London - Philadelphia | Thu, Mar 12 | British Airways
        US$623
        14% off
        US$727 US$623
      • PHL 13:00
        17h 25m
        1 stop
        LON Invalid Date
        Philadelphia - London | Thu, Jan 22 | Normal Airline
        LON 15:00
        6h
        Nonstop
        PHL 16:00
        London - Philadelphia | Sat, Jan 24 | Normal Airline
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      • Cheapest nonstop
        PHL 19:40
        7h 10m
        Nonstop
        LHR 07:50
        Philadelphia - London | Wed, Feb 18 | American Airlines
        US$373 US$419
        11% off
        11% off
        US$419 US$373
      • PHL 19:50
        7h
        Nonstop
        LHR 07:50
        Philadelphia - London | Mon, Jan 26 | American Airlines
        US$373 US$419
        11% off
        11% off
        US$419 US$373
      • PHL 10:31
        18h 29m
        1 stop
        LGW 10:00
        Philadelphia - London | Mon, Feb 9 | Frontier Airlines
        US$202 US$419
        52% off
        52% off
        US$419 US$202
      • PHL 05:30
        23h 30m
        1 stop
        LGW 10:00
        Philadelphia - London | Mon, Feb 9 | Spirit Airlines
        US$206
        51% off
        US$419 US$206
      • PHL 12:46
        17h 14m
        1 stop
        LGW 10:00
        Philadelphia - London | Thu, Mar 19 | Frontier Airlines
        US$209
        50% off
        US$419 US$209
      • PHL 07:00
        22h
        1 stop
        LGW 10:00
        Philadelphia - London | Thu, Jan 29 | Frontier Airlines
        US$216
        48% off
        US$419 US$216
      • PHL 10:31
        18h 29m
        1 stop
        LGW 10:00
        Philadelphia - London | Mon, Jan 26 | Frontier Airlines
        US$221
        47% off
        US$419 US$221
      • PHL 05:30
        23h 35m
        1 stop
        LGW 10:05
        Philadelphia - London | Sat, Jan 24 | Spirit Airlines
        US$225
        46% off
        US$419 US$225
      • PHL 11:47
        17h 18m
        1 stop
        LGW 10:05
        Philadelphia - London | Sat, Jan 24 | Frontier Airlines
        US$227
        46% off
        US$419 US$227
      • PHL 05:30
        23h 30m
        1 stop
        LGW 10:00
        Philadelphia - London | Mon, Jan 26 | Spirit Airlines
        US$227
        46% off
        US$419 US$227
      • PHL 12:32
        16h 28m
        1 stop
        LGW 10:00
        Philadelphia - London | Fri, Jan 30 | Frontier Airlines
        US$231
        45% off
        US$419 US$231
      • PHL 06:00
        20h 50m
        1 stop
        LHR 07:50
        Philadelphia - London | Fri, Feb 27 | Jetblue Airways
        US$244
        42% off
        US$419 US$244
      • PHL 13:00
        17h 25m
        1 stop
        LON Invalid Date
        Philadelphia - London | Thu, Jan 22 | Normal Airline
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Displayed flight fares from Philadelphia to London are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Philadelphia to London Flight Details

The distance between Philadelphia and London is about 5,709.59 km. The average flying time from Philadelphia to London is around 7 hours. Based on Trip.com's latest data, travel demand is highest in January. The off-season for travel is August.

Cheapest one-way flight priceUS$202
Cheapest return ticket priceUS$568
Cheapest monthAugust
Peak season for travelJanuary
Flight distance5,709.59 km
Average flight time7 hours
Flight statistics for the Philadelphia–London route are based on aggregated booking data from Trip.com over the past 12 months.

Frequently Asked Questions

  • What are the cheapest flights from Philadelphia to London (PHL-LON)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$202 on Cheapest nonstop routes (e.g. PHL to LGW on Mon, Feb 9), while British Airways offers Cheapest nonstop round-trips from US$568 departing on Tue, Feb 10 and returning on Mon, Feb 16.
  • It takes about 7 hours to fly from Philadelphia to London.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Philadelphia to London is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Philadelphia to London, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Feb 9, with one-way flights priced at just US$202.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is American Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for London travel is around January.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Philadelphia to London is August, when demand for travel is lower.
  • After crunching the numbers on our January flight calendar, it's currently cheapest to fly from Philadelphia to London on January 24, 2026 with Frontier Airlines, with prices starting at US$450.
  • The time difference between London and Philadelphia is 5h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

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