A passenger who has checked in but not reported to board the flight is called

In aviation terminology, a Gate no-show refers to a passenger who has successfully completed the check-in process (obtaining a boarding pass) but fails to present themselves at the boarding gate before it closes. This is distinct from a general "no-show," which typically refers to a passenger who fails to check in for their flight at all.

• Transit passenger: A passenger who arrives at an airport from one flight and departs on another flight to a third destination, usually staying within the airport's sterile area.
• Deported passenger: An individual who is being legally removed from a country by government authorities.
• Cancelled passenger: A passenger whose reservation has been terminated.

Gate no-shows often cause operational delays because, for security reasons, airlines must identify and offload any checked baggage belonging to that passenger before the aircraft can depart.