Cheap flights from London Heathrow Airport to Pennsylvania from £305

In general, February is the cheapest month to fly from London Heathrow Airport to Pennsylvania. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £580. If you don’t want to visit Pennsylvania in February, then you should wait until January to fly from London Heathrow Airport, when ticket prices are also cheap, with an average price of £581.

According to our data, Tuesday is the cheapest day to fly to Pennsylvania from London Heathrow Airport. The lowest ticket price found for a Tuesday departure recently was £653. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Pennsylvania is Sunday, with ticket prices averaging around £708.

Flying to Pennsylvania from London Heathrow Airport in the morning is the least expensive time of day to depart. momondo users have found prices as low as £682 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Pennsylvania is at midday when prices are around £685.

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

You are more likely to see cheaper flights to Pennsylvania from London Heathrow Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Pennsylvania for around £677 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Pennsylvania from London Heathrow Airport for as low as £577 on momondo.

There are 4 cabin classes available to choose from on London Heathrow Airport to Pennsylvania flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

United Airlines, SWISS, and TAP AIR PORTUGAL are the most popular carriers operating from London Heathrow to Pennsylvania

British Airways, Aer Lingus and Finnair are the top three most popular airlines that fly to Pennsylvania from London Heathrow Airport according to our data. British Airways is the first choice among our users, with 67% of people opting to fly with this airline when travelling to Pennsylvania. Keep in mind that there are 11 different airlines that fly to Pennsylvania on a routine basis, so you have a few additional options to choose from.

As of September 2026, 194 flights take off from London Heathrow Airport and land in Pennsylvania each day. The most common flight departure time for this route is 13:00, with 71% of daily flights taking off in the afternoon.

As of September 2026, 1,364 flights take off from London Heathrow Airport and land in Pennsylvania each week. The most common flight departure day for this route is Thu, with 16% of weekly flights taking off on this day.