Airline tycoon Tony Fernandes said Air Asia has no plans to buy a clutch Airbus' pioneering long-range aircraft, claiming they are "too expensive".
The airline agreed to buy 10 A350s in June 2009 and is one of Airbus' largest customers. The aircraft, which was launched to compete with Boeing's Dreamliner, has a list price of around $320m (£220m).
But Fernandes, the majority owner of QPR football club, today suggested his carrier may renege on the deal.
“The A350 is not an aircraft we will buy,” he said during a Facebook Live chat. “Too expensive. Fares would go up.”
A spokesperson for Airbus declined to comment on customers' fleet plans.
Air Asia has also placed an order for 66 of Airbus' A330neos.
With long lead times, It is not uncommon for airlines to rejig orders, meaning Air Asia could simply swap its A350 order for another aircraft in Airbus' range.
Sources told Reuters news agency Air Asia is in talks with Boeing about buying its 787 Dreamliner, with a final decision expected later this year.