A facile synthetic route to monofluoromethyl substituted epoxides via the desymmetrization of 1,3‐difluoropropan‐2‐ols is reported. A silicon‐containing additive activates the inert C(sp3)−F bond in aliphatic fluorides to promote the intramolecular epoxidation under metal‐free reaction conditions. A phosphazene base, which acts as a catalyst, is indispensable for this silicon‐induced defluorinative cyclization.