When a tower and the approach control closes who takes over the airspace?

When the airport closes, we call the area control centre responsible for the surrounding airspace, and they take over responsibility. In addition, the control zone and TMA actually seize to exist when local ATC is closed, so they both become class G airspace.



When a local Control Tower and Approach Control (TRACON) close for the night, the responsibility for that airspace typically "reverts" to the higher-level Air Route Traffic Control Center (ARTCC), often just called "Center." For example, if a small airport's tower closes at 10:00 PM, the surrounding Class D airspace may become Class E or G (uncontrolled), but IFR (Instrument Flight Rules) traffic will be handled by the regional Center controller. Pilots transition from talking to a local controller to a "Center" controller who manages a much larger geographical area. In 2026, this process is seamless due to ADS-B technology, which allows Center controllers to see low-altitude traffic even when the local tower is dark. At the airport itself, the frequency usually becomes a Common Traffic Advisory Frequency (CTAF), where pilots broadcast their own positions and intentions to other aircraft in the vicinity to ensure safety without active ground-based control.

People Also Ask

When the tower is temporarily closed (or operated on a part-time basis), use the CTAF to self-announce your position or intentions, just like you do at Class E and G airports. Keep in mind, if the tower is due to open shortly, you should have their frequency tuned in advance to speak with the controller.

MORE DETAILS

The CTAF is clearly labeled on aeronautical charts for every airport. It's shown with a C in a solid circle appearing after the CT (Control Tower), UNICOM, or MULTICOM frequency. At towered airports, the CTAF will be listed because it is used after a part-time tower closes for the night.

MORE DETAILS

Pilots use a CTAF to communicate with each other and coordinate their movements. UNICOM, on the other hand, is more like a customer service desk at the airport. It's a radio frequency that pilots use to talk to airport staff, usually at small airports.

MORE DETAILS

In class E airspace, IFR aircraft are controlled by ATC. This might be a center facility (Air Route Traffic Control Center) or approach/departure facility. As a VFR aircraft, you aren't required to be in contact with ATC, but IFR aircraft must operate on an ATC clearance. That means the airspace is controlled.

MORE DETAILS

At least major airports do, for the most part, have fully manned air traffic control towers, 24/7. The closures are usually reserved for non-massive airports.

MORE DETAILS

Aircraft operating on an IFR flight plan, landing at an airport without an operating control tower will be advised to change to the airport advisory frequency when direct communications with ATC are no longer required. Towers and centers do not have nontower airport traffic and runway in use information.

MORE DETAILS

So according to the AIM, for landing, we will make only five calls: Ten miles out, entering downwind, base, final and leaving the runway. Departing, just two, before taxiing, and again before taxiing on the runway for departure.

MORE DETAILS

There are three types of air traffic controllers. These are tower controllers, terminal controllers and en route controllers. The diagram below shows who is in control at various stages of flight.

MORE DETAILS