CONCERNS have been raised over the cost of the Anglesey-Cardiff air link.
Welsh Government Transport Minister Carl Sargeant announced that spending would increase to £1.6 million in 2013/14.
Clwyd West AM Darren Miller, who requested the figures, called on ministers to review the air link’s future.
He added: “The amount of public money being eaten up by this service is extremely worrying and taxpayers may rightly ask if Ieuan Air has had its day.
"The ex-minister who set it up is now long gone from government and in the current financial climate we need to look very carefully at this air-link.”
Welsh Government figures reveal it has spent more than £6 million on the link between RAF Valley and Cardiff International airport since it was established in 2007.
Shadow Minister for Finance Paul Davies AM, said: “The North-South air-link may have a continuing role to play but its mounting subsidy is now becoming intolerable.
“Ministers need to sit down and discuss this air-link’s future. Viability is absolutely crucial and value for money in the long-term has got to be the priority.”
The current contract for the Intra Wales Air Service expires in December 2014.
A Welsh Government spokesperson said: "The Welsh Government is committed to the service.
“The current contract runs until December 2014. As with any other contract a review will take place before any renewal."