This is a paid asset, but now you can download Stylized Plane 3 Free.
Detail this asset from Unity Store: Original Link
Stylized Plane 3 v1.0
“If possible, please buy the package to support the developer”
Stylized plane. Optimized for game engines.
The propeller is separated from the airplane for spinning.
3 different colors.
Texture size: 1024 x 1024 (diffuse)