Skip to main content
Air1Tickets

International route

Cheap flights from Philadelphia to London

Philadelphia International Airport (PHL) to London Heathrow Airport (LHR). 3,536 miles, 6h 50m nonstop.

Depart
Return
Travelers

We check every airline and reply with your price, including the last-minute deals that never reach public search.

PHL to LHR at a glance

Computed from airline schedules and the fares we track for this route. Refreshed several times a day.

Distance
3,536 milesgreat-circle
Typical flight time
6h 50mnonstop, gate to gate
Nonstop airlines
AABA2 airlinesAmerican, British Airways
Nonstop flights per day
2all airlines combined
Cheapest month
February 2027over the next six months
Best day to fly
Tuesday19% less than Sunday
Time difference
5h aheadLondon vs Philadelphia

Philadelphia to London

Round trips from $351

Per traveler, taxes and fees included. Lowest fare we found departs Wed, Feb 3.

Cheapest month: February 2027

See fares on these dates

Lock any fare free — pay only when you accept your last-minute deal

Or ask an agent on WhatsApp

Philadelphia to London fares by month

Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.

  1. September 2026from Tue, Sep 29$434
  2. October 2026from Tue, Oct 6$402
  3. November 2026from Tue, Nov 17$417
  4. December 2026from Tue, Dec 1$387
  5. January 2027from Sat, Jan 9$359
  6. February 2027from Wed, Feb 3$351

Airlines flying Philadelphia to London

2 airlines fly nonstop with 2 departures a day combined, plus 12 more with one stop.

Connecting options

Hubs where one airline can carry you on both legs, most choices first.

Which airport should I use?

PhiladelphiaLondon has 3 airports. Fares can differ by $50 to $150 round trip between them, so check the alternatives before you book.

Other arrival airports near London

Tips for this route

  • Only American and British fly this route nonstop, which keeps nonstop fares firm. A one-stop itinerary through BOS or ATL is usually cheaper if you can spare the extra three to five hours.
  • February 2027 is the cheapest month to fly over the next six months, with round trips from $351; September 2026 is the most expensive at $434 and up, a difference of $83 per traveler.
  • Departing on a Tuesday averages 19% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
  • Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays.
  • London is 5 hours ahead of Philadelphia. Expect to lose 5 hours on the clock heading east, so an overnight or late-afternoon departure tends to arrive at a more usable hour.

Destination guide

London: The most-flown transatlantic route, for good reason

London is the busiest international destination from the US, with nonstops from more than 30 American cities into Heathrow and Gatwick. The museums are free, the theater is world-class and the Tube reaches everything — including Heathrow.

Best time to visit: May–June and September are mild with long days; July–August is warm and busy. December has Christmas markets and lights. January–March is cold and gray but fares can drop below $500 round trip.

Flying the other way? London to PhiladelphiaFares, airlines and tips for LHR to PHL.

Ready to compare live fares?

See every airline on PHL–LHR side by side with bags and seat rules spelled out.

Search Philadelphia to London

Philadelphia to London: common questions

How long is the flight from Philadelphia to London?

A nonstop flight from Philadelphia (PHL) to London (LHR) takes about 6h 50m gate to gate, covering 3,536 miles. Connecting itineraries add the layover, typically 2 to 5 hours more in total.

Which airlines fly nonstop from PHL to LHR?

American Airlines and British Airways operate nonstop flights from Philadelphia (PHL) to London (LHR), with 2 nonstop departures a day between them. One-stop options connect through BOS, ATL and MSP.

What is the cheapest month to fly from Philadelphia to London?

Over the next six months, February 2027 has the lowest round-trip fares from Philadelphia (PHL) to London (LHR), starting at $351 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.

How far in advance should I book Philadelphia to London flights?

Book 6 to 12 weeks ahead; fares climb in the last three weeks and around holidays. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.

What is the time difference between Philadelphia and London?

London is 5 hours ahead of Philadelphia. PHL is on America/New York time and LHR on Europe/London time. Departure and arrival times in search results are always shown in local time at each airport.

Related routes

Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.

More flights from Philadelphia

All routes

More flights to London

All routes
Call nowWhatsApp