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Civil Aviation Authority of Singapore

Air traffic control services

Learn about how air traffic control services ensure the safe, orderly and expeditious flow of air traffic.

Last updated 13 May 2026

CAAS provides air traffic control services for flights that operates in and around Singapore through one of the busiest and most complex airspaces in the region.

Air Traffic Controllers

Air Traffic Controllers play a critical role in managing aircraft movements around the clock to keep flights safe, minimise delays and support growth of air traffic.

  • Issue instructions and clearances to pilots

  • Maintain safe separation between aircraft in the air and on the ground

  • Manage and coordinate traffic flow for arrivals, departures, and en-route flights

Air Traffic Flow Management

CAAS monitors and balances traffic demand and capacity in real time through its Air Traffic Flow Management (ATFM) unit to prevent congestion before it occurs. The unit analyses flight plans, weather conditions, and airspace availability to identify potential bottlenecks, and collaborates with other air navigation service providers and airports to implement ATFM measures that ensure the smooth flow of air traffic.