A Cathay Pacific pilot was arrested ahead of a scheduled flight from London to Hong Kong on Saturday for allegedly possessing knives.
The weapons were discovered during a search of flight crew an hour before the flight was due to take off, according to police.
The 61-year-old pilot was taken into custody at a police station near Heathrow airport on Saturday night and has since been bailed until next month, according to the BBC.
The passengers who were scheduled to fly on the Hong Kong-bound flight had to wait until Sunday to make their journey.
A Metropolitan Police spokesman said the man was arrested on suspicion of possession of an offensive weapon in a public place and possession of a knife blade or sharp pointed article in a public place.
A Cathay Pacific spokeswoman said: “We apologise for the delay and inconvenience caused to the 262 passengers booked on CX254.
“The airline assisted passengers with overnight accommodation and alternative flight arrangements.”