An 88-year-old Perth man has lost his latest legal fight to stop his extradition to Hungary to face war crimes.

The Hungarian Government wants Charles Zentai extradited to Hungary to face a charge of murdering a Jewish teenager in Budapest in 1944.

Mr Zentai denies the charge and has been fighting the extradition application for the past four and a half years.

Today the full bench of the Federal Court upheld a magistrate's decision that he is eligible for extradition.

However it allowed a 14 day stay of proceedings to allow Mr Zentai and his lawyers time to determine if they want to go to the high court.

While the court's judgement means Mr Zentai could be extradited the final decision on his fate lies with the Minister for Home Affairs.

Outside the court, Zentai's son, Ernie Steiner, said the family had also made lengthy submissions to the Home Affairs Minister who would make the final decision on his father's fate.

"As far as that goes, we've never been able to present any arguments about my father's innocence in the courts in Australia," he said.

"But we have a lot of evidence relating to that and a lot of other reasons why my father should not be extradited."

abc.net.au