Trajectory prediction in air trafe c management computes the most likely or the most desirable aircraft trajectories by using models of aircraft performance and atmospheric conditions, as well as measurements of aircraft states. In comparison, actual trajectories are obtained using feedback control from a pilot or autopilot to track e ight objectives, while theaircrafte iesthrough an actual atmosphere. This paperintroduces the concept ofclosedloop sensitivities, which are dee ned as differences between actual and computed trajectories per unit of modeling errors, in thepresenceof pilot/autopilotfeedback controls.Modeling errorsareexpressed asuncertain parameters and/or uncertain functions. Pilot/autopilot control actions are approximated by nonlinear feedback control laws, designedwith themethod of feedback linearization. Both theaircraft equations of motion and the feedbackcontrol laws are linearized around computed reference trajectories, and these linearized equations are used to determine expressions for closed-loop terminal sensitivities. The proposed method is applied to the Center/Terminal Radar Approach Control (TRACON) Automation System as well as e ight management systems.