airport slot; takeoff and landing slot
Refers to the allocated time window for an aircraft to take off or land at an airport, especially at congested airports.
羽田空港の発着枠は限られている。
Haneda Airport's takeoff and landing slots are limited.
新規航空会社に発着枠が割り当てられた。
The new airline was allocated airport slots.
Compound of 発着 (departure and arrival) + 枠 (frame, slot, limit).