$494 Find Cheap Flights from London Heathrow Airport to Philadelphia - Compare and Save

For London Heathrow Airport to Philadelphia, Monday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Philadelphia back to London Heathrow Airport, the best deals are generally found on Wednesday, with Saturday being the most expensive.

The cheapest month for flights from London Heathrow Airport to Philadelphia is November, where tickets cost $740 (return) on average. On the other hand, the most expensive months are July and August, where the average cost of round-trip tickets is $1,091 and $1,062 respectively.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 2 stops layover the cheapest option at $1,017 on average.

To get a below average price on the flight from London Heathrow Airport to Philadelphia, you should book around 2 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

In the past 5 days, the cheapest round-trip tickets from London Heathrow Airport to Philadelphia were found on Aer Lingus ($801) and JetBlue ($803).

There are 2 airlines that fly nonstop from London Heathrow Airport to Philadelphia. They are American Airlines and British Airways. The cheapest airline for this route is American Airlines, with the best round-trip deal found costing $610. On average, the best prices for this route can be found at British Airways.

Weekly flights between London and Philadelphia historically see delays in approximately 18% of cases, with the average delay over the past year being 168 minutes.

Typically, flights leaving in the morning tend to face fewer delays, whereas flights in the early afternoon have historically encountered delays more often.

Statistically, Saturday is the day of the week with the fewest delays on this flight route, while Thursday has typically experienced more delays than other days.

Based on our data, American Airlines have experienced the fewest delays on this route in the past 12 months, with only about 17% of their flights encountering any delays.

Dublin (DUB) is the top choice – 84% of KAYAK users who clicked on 1-stop flights from London Heathrow Airport to Philadelphia picked an itinerary connecting there.

Flights via Montreal (YUL) offer the most affordable fares, with an average round-trip price of $925.

Consider flying via Montreal (YUL) for the shortest journey. The average one-way travel time for flights connecting there is 10h 19m.

If you prefer a quick connection, Montreal (YUL) often has the shortest layovers from London Heathrow Airport to Philadelphia, with an average of 1h 21m.

There are 3 cabin class options for the route. These are Business, Economy and Prem Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are 3 nonstop flights that take off from London Heathrow Airport and land in Philadelphia, with an average flight time of 8h 00m. The most common departure time is 9:00 am and most flights take off in the morning. Each week, there are 21 flights and there are the same amount of flights each day (3).