What is the latest advance notice of flight cancellation?

According to the inquiry of China Travel Service. Com, flight cancellations are usually notified about a week in advance, but if the flight of the plane is affected by the weather, it may be notified about three days in advance, and if the plane breaks down, it may be notified about 2-3 hours in advance.

Flight refers to any scheduled flight that uses aircraft to engage in public transportation of passengers, mail or goods. It also refers to a certain number of passenger ships or passenger planes, or the number of passenger ships or passenger planes sailing. It consists of the two-character code of each airline plus four digits, and the airline code is promulgated by the Civil Aviation Administration.