The jockey Paul Carberry has been found guilty of an offence committed on board an aeroplane, and has been given a two-month sentence.
However, the 32-year-old has been released on bail pending an appeal against the prison sentence.
Carberry pleaded not guilty to a charge of engaging in threatening, abusive or insulting behaviour likely to lead to a breach of the peace on the Aer Lingus flight from Spain to Dublin on 1 October last year.
But at Swords District Court in Dublin, Judge Patrick Brady described Carberry's evidence in the case as contrived.
He said he also had to consider the seriousness of the risk to passengers on a plane travelling at 12,000ft and the distress it had caused to them.
Carberry is a former Aintree Grand National winner.