Budget airline Ryanair is to pull out of its Cardiff to Dublin service in a row over proposed airport charges.
Cardiff airport has defended the proposed charges
In a statement the company says it will transfer the service to Bristol International airport from 1 May.
A spokesman for Cardiff International airport said the proposed charges were less than the average that Ryanair publicly admits it pays across Europe.
Aer Arann says it will take over the 180,000 passengers-a-year route with a twice-daily service from next week.
Ryanair's deputy chief executive, Michael Cawley, said: "Cardiff Airport is pricing itself out of the low fares market.
"Cost increases of the order of 350% belong to an era when the lowest air fare from Ireland to the UK was 250 Euros."
The company says it will provide coach services to Bristol up to 10 May or offer refunds to customers who did not want to transfer to Bristol.
Cardiff International airport defended the proposed charges saying it was the latest in a string of airports to come under attack from Ryanair.
"Statements by the airline about their contract with Cardiff International Airport are incorrect but they are renowned for taking up such positions and have done this with a number of airports in the UK and their native Ireland," the Cardiff International spokesman added.