A theoretical model is used to predict O-2, N-2, CO2, CH4, N2O, and Ar gaseous penetrants' permeabilities through zeolitic filler particles of 4A, DDR and silicalite-1 using their adsorption and diffusion data with minimum and maximum absolute relative errors (AREs) as 4.3 and 6.9% for N-2 and CH4 permeabilities through 4A zeolite, respectively. Average AREs for 4A zeolites incorporated in mixed matrix membranes (MMMs) were found for O-2 permeability using modified Felske's and Maxwell's models as 1.2 and 55.6%, respectively. Those for DDR/MMMs and silicalite-1/MMMs CO2 permeabilities were found as 0.7 and 1.8% for Bruggeman's and Maxwell's models and 3.1 and 22.3% for Maxwell's and Lewis-Nielsen's models, respectively.