The T-x-y measurements for propyl propanoate + ethanol, + 1-propanol, and + 1-butanol obtained at 101.32 kPa in a dynamic ebullometer are reported. All mixtures studied exhibit positive deviations from ideality and are thermodynamically consistent according to the point-to-point test. A minimum boiling azeotrope was found for propyl propanoate (1) + 1-butanol (2) at T = 389.3 K and x1 = y1 = 0.328. The predictions of the activity coefficients and of the vapor phase compositions show good agreement with the ASOG model and moderate agreement with the UNIFAC model.