If you wanna get proper into your flying games, go for Microsoft Flight Sim 2020 if you just like flying, if you like flying and combat look at something like DCS.
Depends if you want a game that is about completing some other objective by flying or simply a game in which you fly planes for the sake of flying planes.
On the flying planes for the sake of flying planes front the new Microsoft flight simulator is better for the realistic looks but for realism in terms of flying the plane I've always been much more a fan of P3D.