The vaporization enthalpies of gamma-octanolactone, gamma- and delta-undecanolactone and gamma and delta-dodecanolactone used commercially as flavor ingredients are reported as are their vapor pressures over the temperature range T = (298.15 to 350) K. Vaporization enthalpies at T = 298.15 K of: (66.0 +/- 3.9), (79.4 +/- 4.4), (80.1 +/- 4.5), (83.9 +/- 4.6), and (84.61 +/- 4.7) kJ . mol (1) and vapor pressures also at T = 298.15 K of: (2.8 +/- 0.9), (0.12 +/- 0.05), (0.09 +/- 0.04), (0.04 +/- 0.02), and (0.03 +/- 0.02) Pa, respectively, have been evaluated by correlation gas chromatography experiments. The vaporization enthalpies of the lactones studied are reproduced within +/- 0.5 kJ . mol (1) using a group additivity scheme reported previously for gamma- and delta-lactones. The vaporization enthalpies of the gamma- and delta-lactones are compared to a similar series of omega-lactones. (C) 2014 Elsevier Ltd. All rights reserved.