This attribute defines the time of flight (the time from launch to burnout) for the Burnout state of a Launch segment of the MCS.
Astrogator <Satellite Object Path> SetValue <Astrogator Object Path>.TimeOfFlight <Value> <Unit>
Specify the time of flight. Choose from the standard options for a time unit of measure.
Astrogator */Satellite/Satellite1 SetValue MainSequence.SegmentList.Launch.TimeOfFlight 600 sec
STK Programming Interface 11.0.1