Cheap flights from Londonderry to Philadelphia
Cheap return flights from Londonderry 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?
- Ryanair
- Spirit Airlines
- Frontier Airlines
These airlines usually offer the cheapest flights from Londonderry to Philadelphia.
What airlines fly indirectly?
- American Airlines
- United Airlines
- Delta Air Lines
These airlines fly from Londonderry to Philadelphia, but you’ll have at least one layover.
How long is the flight?
12 hours 30 minutes
This is the shortest flight time from Londonderry to Philadelphia.
Alternative flights from the UK to Philadelphia
Check out prices for other routes
Alternative flights from Londonderry
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 Londonderry/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 Londonderry to Philadelphia
Tips and advice from our flight experts
You've searched for flights from Londonderry to Philadelphia. We've found 15 flights and compared them to give you the best offer. Ryanair is the average cheapest airline for this route, so keep an eye on them. The cheapest offer we've found is a one-way ticket for Londonderry to Philadelphia on 05/07/2026 at 15:10 for £69.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 5 airlines that operate the 5,200 km flight from Londonderry to Philadelphia.
To find the best offers, book in advance or look for last-minute deals. Consider flying with Ryanair, which operates this route, and remember the average flight duration is 12 hours 30 minutes. After selecting an offer, fill out your information, proceed to payment, and consider booking a hotel with us or using our flight + hotel service to save time and money.
Other popular destinations near Philadelphia
Where other people are flying to
