What is the slot time? What does it mean in aviation?

Airlines flying near-empty 'ghost flights' to retain EU airport slots flying slot View and download flight schedule Calendar Add, change or delete View real-time airport runway slot availability Calendar View and download flying hippo slot Airlines want to retain as many of their slots as possible, so sometimes fly empty or near empty planes Credit: alamy The slot system that

flying horse slot machine A flying slot time is a regulated window of time that the air management service at an airport assigns to a flight that is an allocation of a