Objective To identify factors influencing the outcome of postoperative radiotherapy in patients with advanced laryngeal cancer. Design The files of 44 patients with advanced laryngeal cancer who were treated by surgery followed by radiotherapy (24 with pT3 and 20 with pT4) were reviewed. Median delay in starting radiotherapy was 50 days (range, 19-150 days). Treatment variables, in addition to certain patient and tumor characteristics, were analyzed in terms of locoregional control and survival. Setting Major referral tertiary center in central Israel. Results Locoregional control rates were 86% and 81% at 2 and 5 years, respectively, and corresponding survival rates were 82% for both. Only nodal involvement retained statistical significance for both locoregional control as well as survival on multivariate analysis (P = 0.0009 and P = 0.0004, respectively). Conclusions This is the first study showing that delay in postoperative radiotherapy in advanced laryngeal cancer is not a significant predictor of locoregional control or survival in advanced laryngeal cancer. Only lymphatic spread was found to have a significant influence on treatment outcome.