Cheap flights from Cardiff to Knoxville
Cheap return flights from Cardiff to Knoxville
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Knoxville flight facts
What you need to know
What are the cheapest airlines?
- Ryanair
- EasyJet
- American Airlines
These airlines usually offer the cheapest flights from Cardiff to Knoxville.
What airlines fly indirectly?
- British Airways
- Delta Airlines
- United Airlines
These airlines fly from Cardiff to Knoxville, but you’ll have at least one layover.
How long is the flight?
12 hours 30 minutes
This is the shortest flight time from Cardiff to Knoxville.
Alternative flights from the UK to Knoxville
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/Knoxville route. There are around 35 flights on any given week from the UK to Knoxville 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 Knoxville
Tips and advice from our flight experts
You've searched for flights from Cardiff to Knoxville. We've found 25 flights and compared them to give you the best offer. Ryanair 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 Cardiff to Knoxville on 21/02/2026 at 19:55 for £35.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 15 airlines that operate the 7,500 km flight from Cardiff to Knoxville.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. Ryanair is a popular cheap airline for this route, and the average flight duration is about 12 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. We also recommend booking a hotel with us or using our flight + hotel service to save time and money.
Other popular destinations near Knoxville
Where other people are flying to
