Cheap flights from the United Kingdom to Philadelphia from £247

If you aren’t able to travel during the month of September, then book flights to Philadelphia from United Kingdom during May instead. Flights to Philadelphia in May, while not as cheap as those in September, still average around £539.

Our data shows that Wednesday is the least expensive day to fly to Philadelphia. Tickets to fly out on this day can be as low as £613. On the other hand, Sunday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £681.

The cheapest time of day to fly to Philadelphia is in the morning when flights can be purchased for as low as £632. At midday is when there is more demand to fly to Philadelphia, so prices are often more expensive at around £640 per ticket.

Fly from London Heathrow to Philadelphia for the best United Kingdom - Philadelphia flight prices

You are more likely to see cheaper flights to Philadelphia from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Philadelphia for around £581 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Philadelphia from United Kingdom for as low as £525 on momondo.

There are 3 cabin classes available to choose from on United Kingdom to Philadelphia flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

JetBlue, Lufthansa, and British Airways are the most popular carriers operating from United Kingdom to Philadelphia

Virgin Atlantic, British Airways and Aer Lingus are the top three most popular airlines that fly to Philadelphia from United Kingdom according to our data. Virgin Atlantic is the first choice among our users, with 37% of people opting to fly with this airline when travelling to Philadelphia. Keep in mind that there are 25 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between United Kingdom and Philadelphia have experienced a delay on any given week. The average delay length over the past 12 months has been 179 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Wednesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, British Airways have had the fewest delays on this route over the last 12 months, with about 16% of their flights experiencing any sort of delay.

The number of flights available between United Kingdom and Philadelphia is 19 per day as of March 2026. The most frequent departure time is 13:00, with 75% of daily flights leaving in the afternoon.

133 flights are operational weekly from United Kingdom to Philadelphia as of March 2026. The most popular departure day for this route is Mon, with 14% of flights per week taking off on this day.