Cheap flights from London-Heathrow to Philadelphia
Cheap return flights from London-Heathrow to Philadelphia
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Philadelphia flight facts
What you need to know
What are the cheapest airlines?
- Norwegian Air
- British Airways
- American Airlines
These airlines usually offer the cheapest flights from London-Heathrow to Philadelphia.
What airlines fly indirectly?
- Icelandair
- United Airlines
- Delta Air Lines
These airlines fly from London-Heathrow to Philadelphia, but you’ll have at least one layover.
How long is the flight?
7 hours 30 minutes
This is the shortest flight time from London-Heathrow to Philadelphia.
Alternative flights from the UK to Philadelphia
Check out prices for other routes
Alternative flights from London-Heathrow
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the London-Heathrow/Philadelphia route. There are around 35 flights on any given week from the UK to Philadelphia and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from London-Heathrow to Philadelphia
Tips and advice from our flight experts
You've searched for flights from London-Heathrow to Philadelphia. We've found 25 flights and compared them to give you the best offers. Norwegian Air is, on average, the cheapest for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket for the route from London-Heathrow to Philadelphia on 27/02/2026 at 12:30 for £59.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 15 airlines that operate the 5,600 km flight from London-Heathrow to Philadelphia.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. The off-peak season is typically cheaper. Norwegian Air is a popular budget option for this route, and the average flight duration is about 7 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to save time and money!
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