Newton's third law (as in, thinking of air molecules hitting the wing underside, disregarding any interactions between air molecules) would work for something like a spacecraft in the initial process of reentry, where one may assume that the atmosphere is so thin that air molecules don't interact much with each other. Lower down that assumption is no longer valid, and then applying Newton's laws to a continuum of interacting particles gives you fluid mechanics (Navier-Stokes etc).