Ryanair boss Michael O’Leary said airports should introduce a limit of two alcoholic drinks for passengers.

O’Leary believes that airports need to “limit the amount of alcohol that can be sold to a passenger to two alcoholic drinks” to reduce cases of passengers being disruptive on flights, according to the Independent.

“Just as you have to show your boarding pass when you buy cigarettes or alcohol in the duty-free shop, we believe you have to show your boarding pass when you buy an alcoholic drink in an airport bar. And you should not be served more than two alcoholic drinks, especially during flight delays,” he said.

Ryanair, an Irish ultra-low-cost airline, and other European airlines have noticed a “rise” in the number of disruptive passengers on board their planes “particularly this summer,” O’Leary said in an interview with the Independent.

O’Leary said record-breaking flight delays this summer contributed to the problem, as some travelers turned to airport bars to pass the time.

According to the Ryanair manager, delays in air traffic control contributed to flights not departing on time this summer.

Ryanair carried 58.4 million passengers in May, June and July this year.

According to The Independent, Ryanair’s CEO also said he wanted to see “more effective” local penalties for travelers who are banned from flights because of their disruptive behavior.

The airline is in contact with several European governments over the issue of disruptive passengers, O’Leary said.

A factsheet published by the International Air Transport Association reported an annual “increase in the number of reported incidents of improper passenger conduct.”

According to IATA, the rate for 2023 was one incident per 480 flights. In 2022, it was one per 568 flights.