Book cheap flights from London to Philadelphia with Netflights. We scan all 423 of the weekly flights going via Philadelphia, so that you can compare them in one place. If you can’t find what you’re looking for, simply adjust the filters to widen your search.
London Heathrow (LHR) is the most popular airport in this city for flights to Philadelphia, and the most popular airlines are British Airways, Finnair & Virgin Atlantic. Both flight prices and accommodation rates fluctuate throughout the year, but searching by month will reveal the cheapest times to fly.
On average, the 5723 km flight to Philadelphia takes 12 hrs 55 mins. If you want a bargain, keep an eye out for flights with Air Canada, as they often have good deals. Or you could broaden your search by looking at flights to other airports in the USA to see if there are any cheaper options.
Today, we’ve scanned 4,577 flights, to help you see all the options for your trip to Philadelphia. Once you’ve chosen your flight, why not check out our deals on accommodation and car hire? You’ll find lots of hotels in the USA, including some close to the airport – perfect if you're arriving late or leaving early.