On August 14, Choe Sang S. was caught smoking in the toilet during the five-hour-long Korean Air flight. The crew reported the incident to local authorities upon landing at Tan Son Nhat Airport.

Passengers are almost always reminded not to smoke before take-off, but some still try to sneak a puff in the toilets, ignoring the no-smoking warnings.

Smoking is one of many flight safety violations reported in Vietnam in recent years.

In 2017 a Chinese man received a $172-fine for smoking on a flight from Taipei to Hanoi.

The same year, flight bans were imposed on 40 people in Vietnam for smoking, fighting or stealing on flights.