In this paper we use the extensive quasiclassical trajectory (QCT) study recently concluded [Journal of Chemical Physics, Vol. 104, No. 8, 1996] to model the kinetics of the primary NO formation reaction, N2 + O → NO + N in hypersonic nonequilibrium flows. The QCT data are used to obtain expressions for the thermal rate constant, reactant energy removal, and product energy disposal rates of this reaction. The QCT results are coupled with the continuum conservation flow equations, and these equations are used to simulate the Bow-Shock UltraViolet2 (BSUV2) flow at altitudes between 75 to 87.5km. It is found that the use of the Macheret and Rich [Chemical Physics, Vol. 174, 1993] vibration-dissociation coupling model along with the QCT rates gives improvements in the NO concentration predictions at altitudes between 80 to 85km. Also, we find that the vibrational and rotational temperatures of NO formed are much higher than that of the N2 and O2 in the gas, in accordance with the BSUV2 measurements. The amount NO produced in the flowfields at 87.5 km and above are found to be strongly dependent on the freestream density of atomic oxygen.