A man accused of murdering his wife and her best friend in far north Queensland more than two decades ago is expected to surrender to police today.

Queensland coroner Michael Barnes ordered a warrant be issued for Alan Leahy's arrest a fortnight ago over deaths of Julie-Anne Leahy and Vicky Arnold near Atherton in 1991.

Mr Barnes found Mr Leahy should stand trial for the killings after rejecting the findings of two previous inquests and police that the 1991 deaths were a murder-suicide.

He gave Mr Leahy two weeks to surrender himself to Queensland police and an arrest warrant will be issued at midnight (AEST) if he fails to do so.

In a statement issued last week, Mr Leahy's lawyer said his client categorically denies any involvement in the women's deaths and expressed his disappointment at the findings.

His lawyers indicated Mr Leahy intends to voluntarily surrender himself into custody in Queensland and has never hesitated to attend before any coroner or investigator and cooperate.