Low-cost airline Ryanair has banned eight passengers for life for compromising passenger and crew safety by smoking on board.
Ryanair said smoking on board threatened safety
The people were on different flights, and all cases have been referred to police.
They could face charges relating to plane, crew and passenger safety.
The airline said there was "a tiny minority of passengers who stupidly and recklessly persist in endangering the safety of others by smoking on board".
The airline made the announcement on Wednesday - No Smoking Day.
Smoking on board was "strictly prohibited", and passengers who continue to smoke will be handed to police for prosecution, spokesman Paul Fitzsimmons said.