Cheap flights from Cardiff to Key West
Cheap return flights from Cardiff to Key West
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Key West flight facts
What you need to know
What are the cheapest airlines?
- Ryanair
- American Airlines
- JetBlue
These airlines usually offer the cheapest flights from Cardiff to Key West.
What airlines fly indirectly?
- British Airways
- Delta Airlines
- United Airlines
These airlines fly from Cardiff to Key West, but you’ll have at least one layover.
How long is the flight?
12 hours
This is the shortest flight time from Cardiff to Key West.
Alternative flights from the UK to Key West
Check out prices for other routes
Alternative flights from Cardiff
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 Cardiff/Key West route. There are around 35 flights on any given week from the UK to Key West 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 Cardiff to Key West
Tips and advice from our flight experts
You've searched for flights from Cardiff to Key West. We've found 15 flights and compared them to give you the best offer. Ryanair is, on average, the cheapest for this route. Look out for their deals! The cheapest offer we've found is a one-way ticket for £36 from Cardiff to Key West on 16/06/2026 at 23:35.
We've scanned hundreds of airfares from dozens of airlines across the globe. We've found 5 airlines that operate the 7,500 km flight from Cardiff to Key West.
To find the best offers, book in advance or look for last-minute deals. Consider flying with Ryanair, which is popular and offers an average flight duration of 12 hours. After selecting an offer, fill out your information and payment. Don't forget to book a hotel with us or use our flight + hotel service to save time and money.
Other popular destinations near Key West
Where other people are flying to
