Experimental measurements and predictions for dissociation conditions of carbon dioxide hydrates in the presence of 0.05, 0.10, 0.15, and 0.20 mass fractions triethylene glycol aqueous solutions and methane hydrates in the presence of 0.245, 0.40, and 0.50 mass fractions triethylene glycol aqueous solutions are reported in this work. The data have been measured in temperature ranges of (264.7 to 282.6) K for carbon dioxide hydrates and (264.8 to 275.8) K for methane hydrates in the presence of triethylene glycol aqueous solutions. The experimental data have been measured using a reliable isochoric technique. A general correlation has been used for predicting hydrate dissociation conditions. Acceptable agreement has been achieved between experimental and predicted data with a maximum of 0.5 K deviations.