Lean blowout limits play a critical role in the operational envelope of aircraft. Semiempirical correlations, a convenient and fast methodology to estimate the lean blowout limits for aircraft engine combustors, are extensively employed in the preliminary combustion design stage. Among the correlations, Lefebvre’s model is widely used. However, it is argued that the influences of the variations of combustor’s configurations upstreamof dilution holes on lean blowout cannot be embodied in thismodel. Based on Lefebvre’s correlation, a new physical model is established and a flame volume concept is proposed according to the experimental observations. Then, an improved correlation (i.e., flame volume lean blowout model) is derived to consider the effects of the variations of dome geometry and primary zone configurations. The flame volume lean blowoutmodel is verified bymany fuel-lean visual experiments. In the experiments, three kinds of swirl-stabilized assemblies and two different primary hole arrangements have been employed. It is concluded that the flame volume lean blowout model shows better agreement with the corresponding experimental values of different designs than the Lefebvre model. The prediction uncertainties of the two models are about 15 and 45% in the present combustion chamber configurations, respectively.