What is considered the primary reason for a flight's "No Show" status?

The primary reason for a flight's "No Show" status is when the passenger did not arrive for the flight. This indicates that the individual did not check in or board the aircraft at the designated time, resulting in their reservation being marked as a "No Show." This status is important for airlines as it helps to manage passenger lists and seats, allowing other travelers to be accommodated if available or to have accurate data for flight planning.

In contrast, a flight being canceled pertains to operational decisions by the airline, such as mechanical issues or weather conditions, and it results in passengers being informed ahead of time. Losing a boarding pass may be inconvenient, but it does not automatically lead to a "No Show" status if the passenger arrives at the airport in time and can verify their booking. Similarly, if a flight arrives early, it does not affect a passenger's attendance; if they are present at the gate, they may still board. Thus, the correct definition of "No Show" is firmly tied to the passenger's absence at the point of departure.