Definition
The FAA office that accepts and processes reservations for unscheduled IFR operations at designated High Density Traffic Airports, allocating limited arrival and departure slots to control traffic volume.
Plain English
An FAA office you contact to book a takeoff or landing slot at certain very busy airports that limit how many flights can come and go each hour.
Context Anchor
You may see this term when planning a flight to or from a busy airport that requires advance reservations for some operations.
Derivation
“Reservation” comes from the idea of holding something back for a specific use. In this term, what is being held is not a seat or a parking spot, but a limited arrival or departure opportunity at a busy airport.
Why Pilots Care
At slot-controlled airports, you cannot simply file IFR and show up. Without a confirmed reservation from this office, the flight will not be accepted into the system, regardless of weather, fuel, or readiness.
Intuition Check
Do not read “reservation” here as a gate, parking space, or hotel-style booking. In this context, it means an FAA-approved time for a flight to use a busy airport when access is limited.
Example Sentence 1
Before flying our charter into DCA, we called the Airport Reservation Office to secure an arrival slot.
Example Sentence 2
Without prior approval from the Airport Reservation Office, unscheduled arrivals at the high-density airport during the restricted period are not permitted.