Lateral displacement in a U-turn may become a problem when aircraft position has to be accurately maintained, but the excess thrust is inadequate to sustain level turn of sufficiently small radius. It seems plausible that lateral displacement in a U-turn can be diminished at the expense of mechanical energy: This trade of energy is the subject matter of this study. With use of a perturbation technique, closed-form analytical solution has been obtained for the lateral displacement and mechanical energy loss at the exit of the turn, under the assumption that lift coefficient remains constant throughout the turn. The results elucidate intrinsic differences between airspeed-depleting and altitude-depleting turns.