The “fifth” and “fourth” generation fighters’ supersonic cruise flight comparative analysis approach is proposed and demonstrated. The IVth and Vth generation supersonic cruise flight parameters difference is shown. “Effective supersonic cruise flight” as characteristic feature of the Vth generation is proposed together with it’s criteria. “Supercruise” flight regime is investigated and it is shown that “supercruise” is not optimal from supersonic cruise range yet. “Supercruise” ability does not guarantee the supersonic performance advantage.