The ability isn’t limited to creature cards in your hand. If an effect allows you to cast creature cards from some other zone, then Winding Canyons will allow you to do so as though they had flash.
Legalitet:
Standard: Ej legal
Pioneer: Ej legal
Modern: Ej legal
Legacy: Legal
Vintage: Legal
EDH / Commander: Legal
Pauper: Ej legal
Explorer: Ej legal
Historic: Ej legal
Brawl: Ej legal
Premodern: Legal
93/94: Ej legal