What is Turnaround Time (TAT) in Aviation?

The Turnaround Time (TAT) in Aviation is the time of the turn-round process from reaching parking position (AIBT, Actual In Block Time) to leaving parking position (AOBT, Actual Off Block time).

TAT = AOBT - AIBT

TAT - Terminology

Airport Collaborative Decision-Making (A-CDM) specifies different terms for TAT:

• Minimum Turn-round Time (MTTT): The minimum turn-round time agreed with an AO/GH for a specified flight or aircraft type.
• Scheduled Turn-round Time (STTT): The time period between scheduled in block time and scheduled off block time (SOBT - SIBT).
• Estimated Turn-round Time (ETTT): The time estimated by the AO/GH on the day of operation to turn-round a flight taking into account the operational constraints.
• Actual Turn-round Time (ATTT): The time period between actual in block time and actual off block time (AOBT – AIBT).

Further reference:

• Airport Collaborative Decision Making (A-CDM) Implementation Manual, Eurocontrol