Cheap flights from Londonderry to St. Louis
Cheap return flights from Londonderry to St. Louis
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
St. Louis flight facts
What you need to know
What are the cheapest airlines?
- Spirit Airlines
- Frontier Airlines
- Allegiant Air
These airlines usually offer the cheapest flights from Londonderry to St. Louis.
What airlines fly indirectly?
- American Airlines
- Delta Air Lines
- United Airlines
These airlines fly from Londonderry to St. Louis, 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 St. Louis.
Alternative flights from the UK to St. Louis
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/St. Louis route. There are around 35 flights on any given week from the UK to St. Louis 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 St. Louis
Tips and advice from our flight experts
You've searched for flights from Londonderry to St. Louis. We've found 25 flights and compared them to give you the best offer. Spirit Airlines is the average cheapest airline for this route, so look out for them. The cheapest offer we've found is a one-way ticket for £89 from Londonderry to St. Louis on 27/04/2026 at 04:35.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 5 airlines that operate the 6,800 km flight from Londonderry to St. Louis.
To find the best offers, book in advance and consider traveling during off-peak seasons. Spirit Airlines is a popular and cheap option for this route, with an average flight duration of 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 St. Louis
Where other people are flying to
