Mariusz Cicheki, aged 34, from Poland, but whose address was listed on his charge as no fixed abode, was one of five men arrested following a drink-fuelled disturbance on an Aer Lingus flight from Warsaw to Dublin.
Dublin District Court heard that at one stage the captain thought about returning to Warsaw.
The man was fined €600 after he pleaded guilty to a charge of engaging in threatening and abusive behaviour on flight EI363.
The charge was under the Air Navigation Transport Act, which can carry a possible jail sentence.
Garda Niall Minnock told Judge Cormac Dunne that Cicheki was arrested at 1.45pm at Dublin Airport.
He was then brought to Finglas Garda station where he was charged with the offence.
After caution he made no reply.
Garda Minnock said Cicheki was in a party of five males who were intoxicated.
The court heard he was the “main instigator” during the incident.
It was told he had been warned by cabin crew before he was moved to a different part of the plane.
Garda Minnock said Cicheki then “attempted to put his hand up the air hostess’s skirt and later touched the air hostess on her behind”.
Judge Dunne said that at one stage the captain had to give a warning that “he was tempted to return the aeroplane to Warsaw”.
He told the defendant that the level of allegation against him was higher due to the improper advances he made to the flight crew member on two occasions.
Cicheki, who had communicated with the court via an interpreter, said he did not need a solicitor.
He confirmed he was pleading guilty to the offence. He also said he had a job in Poland.
Judge Dunne fined him €600 and ordered that it must be paid within three days otherwise Cicheki would be jailed for a week.