Isothermal vapor-liquid equilibria, VLE, excess molar enthalpies, H-m(E), and excess molar volumes, V-m(E), were determined for 1,2-epoxybutane+methanol, +ethanol, +1-propanol, and +2-propanol at 298.15 K. The VLE results were correlated with the Wilson equation, and H-m(E) and V-m(E) were correlated with the Redlich-Kister equation. Nonideality of the vapor phase was accounted for in the analysis of VLE data. Azeotropes occurred in the system 1,2-epoxybutane+methanol and, to a lesser extent, for 1,2-epoxybutane+ethanol.