While all the circumstances of what occurred on board are not known, it’s understood the woman was involved in an altercation with another passenger forcing cabin crew members to intervene.
The flight commander was informed of the matter while air traffic controllers were also advised and requested to alert Gardaí.
A Garda spokesperson confirmed that officers spoke to the woman before she was cautioned and allowed continue her journey.
A spokesman for United Airlines said: “Flight UA25 from New York/Newark to Shannon was met by police officers this morning on arrival at Shannon Airport following reports of a disruptive passenger onboard.”
In January, an Air Canada flight diverted to Shannon Airport after a passenger was reported to have been ‘acting strangely.’
In 2016, there were two incidents where aircraft diverted to Shannon with unruly passengers.