The Jeju Air LJ401 flight from Cheongju to Jeju was delayed for one hour due to a passenger cancellation. A man in his 40s, Mr. A, canceled his boarding due to his father's critical condition. During this process, police and the National Intelligence Service conducted an identity check on Mr. A and searched the area around his seat according to aviation security procedures. These security verification procedures caused the flight delay. Eventually, LJ401, with 191 passengers excluding Mr. A, took off at 12:25 pm.
