What does the term 'No-op' refer to in airline operations?

The term 'No-op' in airline operations refers to a flight that is cancelled and will not operate. This designation indicates that the airline has formally decided to cancel the flight, meaning it will not take off as initially planned, and passengers would need to find alternative travel arrangements. Understanding this terminology is essential for airline staff, as it informs them about the nature of the flight's status and helps them provide accurate information to customers regarding their travel plans and options available for cancelled flights.