Creep, reptation, and saltation are the processes governing sand transport in geophysical phenomena such as bedform evolution and desertification. Their relative contributions to the total horizontal mass flux, which remain uncertain and will affect the transport rate of sand grains and the morphology of ripples and dunes. Using the discrete element method (DEM), we quantitatively estimated the relative contributions of these three transport modes to the kinetic energy, mass concentration and horizontal flux. Our results show that the incident energy absorbed by creeping particles (cretons) is a very small fraction (<0.5%), whereas the energy absorbed by saltating particles (saltons) increases from 13% to 50% as the incident energy increases. Conversely, the energy absorbed by reptating particles (reptons) decreases from 35% to 3%. At a wind speed of 14.8 m/s and particle diameters of 0.3-0.36 mm, the mass concentrations of cretons, reptons, and saltons are 3.4%, 48.6%, and 48.0%, respectively, with corresponding horizontal flux ratios of 0.3%, 46.4%, and 53.3%. This means that the reptation process needs to be considered in an aeolian model. Our findings have far-reaching implications, including the formation of sand ripple and refinement of saltation flux parameterizations.