QPR owner Tony Fernandes says missing AirAsia flight is 'worst nightmare'
AirAsia Indonesia flight QZ8501, an Airbus A320-200, disappeared over the Java Sea an hour into its flight at 06:24 local time (23:24 GMT Saturday).
Bad weather was reported in the area but no distress call was made and no wreckage has been sighted.
The plane had left Surabaya in eastern Java at 05:35 local time (22:35 GMT Saturday) and was due to arrive in Singapore at 08:30 (00:30 GMT).
Mr Fernandes, AirAsia's chief executive, flew to Surabaya and later told a press briefing: "We are very devastated by what's happened, it's unbelievable."
"Our concern right now is for the relatives and for the next of kin - there is nothing more important to us, for our crew's family, and for the passengers' families."
"We hope that the aircraft is found quickly, and we can find out the cause of what has happened."