We investigate the combined effects of chemical reaction and slip condition on unsteady heat and mass transfer to MHD oscillatory flow through a channel filled with saturated porous medium. Exact solution of the governing equations for fully developed flow is obtained in closed form. The effects of various material parameters like Hartmann number, radiation parameter, Reynolds number, magnetic Reynolds number, Grashof number, modified Grashof number, porosity parameter, and frequency of the oscillation are discussed on flow variables and presented by graphs.