Cheap flights from Pennsylvania to London from $226

The cheapest month to fly to London from Pennsylvania is in February. Flight prices, which tend to average around $735, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from Pennsylvania averaging around $736.

The cheapest day to depart from Pennsylvania to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $939. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,169. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from Pennsylvania in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $982 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $1,117. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from Pennsylvania when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $1,030 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Pennsylvania for as low as $944 on momondo.

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

Icelandair, JetBlue, and United Airlines are the most popular carriers operating from Pennsylvania to London

British Airways, American Airlines and Iberia are the top three most popular airlines that fly to London from Pennsylvania according to our data. British Airways is the first choice among our users, with 54% of people opting to fly with this airline when traveling to London. Keep in mind that there are 11 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

The number of flights available between Pennsylvania and London is 18 per day as of September 2026. The most frequent departure time is 9:00PM, with 100% of daily flights leaving in the evening.

The number of flights available between Pennsylvania and London is 126 per week as of September 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.