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Find cheap one-way flights from Philadelphia to London starting at US$252.

We've found these cheap flights for you. You can book one-way or round-trip flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from Philadelphia to London?

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Cheapest airlines flights from Philadelphia to London

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From US$219
Spirit Airlines
From US$235
United Airlines
From US$295
Air Canada
From US$306
American Airlines
From US$571
ANA airlines

Find more flights and airlines

Find cheap flights from Philadelphia to London by different airports

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Philadelphia to London.

  • Cheapest
    Frontier Airlines
    PHL
    22:18
    17h 37m
    2 transfer
    YXU
    15:55
    Philadelphia International Airport - London International Airport
    Tue, Apr 2Frontier Airlines
    US$219
  • Frontier Airlines
    PHL
    22:18
    17h 37m
    2 transfer
    YXU
    15:55
    Philadelphia International Airport - London International Airport
    Tue, Apr 2Frontier Airlines
    US$219
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Philadelphia (PHL) to London (YXU) the cheapest?

    Airlines adjust prices for flights from Philadelphia to London based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Philadelphia (PHL) to London (YXU) cost?

    According to Trip.com's data, the lowest price is around $358.
  • What is the transportation method from the main airport to downtown in London?

    • The distance from London International Airport to downtown is about 8km. It takes about 20 minutes by taxi.

Philadelphia to London Flight Information

Cheapest nonstop flight price

$252

Off-season for travel

February

Peak season for travel

January