Harrow pupil Archie Lloyd, 18, was celebrating the end of his A-level exams with friends in the town of Malia on the Greek island when he was knocked to the ground by Sebastian Trabucatti in August 2015.
Greek judges spared the killer any immediate jail time and handed him a suspended four-year prison sentence.
Trabucatti appeared at the Court of First Instance in Heraklion after a UK coroner recorded a verdict of unlawful killing at an inquest in 2016.
The 25-year-old Briton hit the teenager during a 5am row in the middle of a street off Malia’s main strip, the Crete court was told.
They had exchanged insults which culminated in Mr Lloyd saying to Trabucatti: “One day you will work for me”.
Mr Lloyd, of Micheldever near Winchester, Hampshire, died on the penultimate day of his Interrail holiday after the assault near the Cloud Nine nightclub where Trabucatti had worked.
Mr Lloyd and his best friend Andy Hutchinson had been walking in the middle of the road but clashed with Trabucatti when he and two women on quad bikes hooted at them to move out of the way.
They had briefly met hours earlier in a nightclub toilet where they talked about girls and their trip, the courtroom was told.
Trabucatti, of Haywards Heath, West Sussex, punched Mr Lloyd in the face and pushed over Mr Hutchinson after telling the pair to apologise for shouting obscenities to the women, the court heard.
Trabucatti denied being responsible for the death, claiming it was a slap and not a punch, and said: “I never expected anything like this to ever happen.”
The family of Mr Lloyd said: “We have been waiting almost three years for the day when Archie’s attacker was brought to justice and we are relieved that this moment has finally come.
“Sebastian Trabucatti took our wonderful son, brother and friend away from us when he attacked him, shattering many lives as a result.
“While nothing will bring Archie back, we are pleased that he was found guilty of the first degree criminal offence of which he was accused.”