Cheap flights from the United Kingdom to Philadelphia from $304

The cheapest month to fly to Philadelphia from United Kingdom is in September. Flight prices, which tend to average around $670, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Philadelphia, with average flight prices from United Kingdom averaging around $705.

The cheapest day to depart from United Kingdom to Philadelphia is on a Thursday. Travelers who choose to depart for Philadelphia on a Thursday will often find tickets for as low as $785. 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 travelers. As a result, prices tend to be around $913.

According to our data, the cheapest time of day to fly to Philadelphia is at noon. momondo users have found flights departing from United Kingdom to Philadelphia at noon for as low as $801. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Philadelphia is in the morning when prices are around $831.

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 $769 when searching weeks out. 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 $686 on momondo.

There are 4 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 SWISS are the most popular carriers operating from United Kingdom to Philadelphia

British Airways, Aer Lingus and Virgin Atlantic are the top three most popular airlines that fly to Philadelphia from United Kingdom according to our data. British Airways is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Philadelphia. Keep in mind that there are 18 different airlines that fly to Philadelphia on a routine basis, so you have a few additional options to choose from.

Historically, on average around 18% 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 176 minutes.

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

Wednesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 17% of their flights experiencing any sort of delay.

The number of flights available between United Kingdom and Philadelphia is 10 per day as of February 2026. The most frequent departure time is 1:00PM, with 53% of daily flights leaving in the afternoon.

As of February 2026, 70 flights take off from United Kingdom and land in Philadelphia each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.