Asiana flight attendants found the wrong passenger on a plane traveling from Hong Kong to South Korea this week, and were forced to turn around and ground the flight.
According to The Associated Press, the 259 passengers aboard were returned to Hong Kong on Monday, airline officials said.
The plane began flying back to Hong Kong when it was above Taiwan, Asiana Airlines officials said, speaking on the condition of anonymity because their company was still checking details of the incident.
The passenger, believed to be a South Korean, was supposed to take a Jeju Air plane from Hong Kong to Incheon and it wasn't known how he got on a wrong plane, according to Asiana Airlines.
The Jeju Air plane was to leave Hong Kong 40 minutes later than the Asiana plane, Asiana officials said.
They said police would question the passenger at Hong Kong's airport.
An Asiana plane crash-landed at the San Francisco airport in 2013, killing three passengers and injuring nearly 200 people.