Qantas has confirmed flight QF21 between Melbourne and Dallas was diverted on Friday due a disruptive passenger on board.

Fellow passengers are believed to have assisted after a flight attendant was bitten on plane travelling between Melbourne and the US.

Fellow passengers are believed to have assisted after a flight attendant was allegedly bitten on plane travelling between Melbourne and the US, with the plane diverted to Tahiti.

Passenger banned from travelling on all Qantas Group flights