Isothermal vapor-liquid equilibrium (VLE) data at 303.15 K are reported for the binary systems of di-isopropyl ether (DIPE) + 1-propanol, DIPE + 2,2,4-trimethylpentane, and 1-propanol + 2,2,4-trimethylpentane and also for the ternary system of DIPE + 1-propanol + 2,2,4-trimethylpentane by using headspace gas chromatography. Additionally, the excess molar volumes (V E ) at 303.15 K for the same systems were also determined by measured densities. The experimental binary and ternary VLE data were correlated with G E model equations and the V E were correlated with the Redlich-Kister equation for binary systems and the Cibulka equation for ternary system, respectively.