Excessive forces applied during endotracheal intubation may cause damage to laryngeal structures leading to patient morbidity and mortality. Simulators are widely used for intubation training, but recent studies have shown significant differences in airway anatomy as well as forces applied during intubation when compared to humans. This study assesses the differences in intubation training on three partial-task trainers, TruCorp AirSim Standard, Laerdal Airway Management Trainer, and VBM Air Management Simulator Bill I, against cadavers. Objective force measurements and subjective ratings of difficulty and force used were measured. Using ANOVA and paired t-tests, endotracheal intubation on simulators was found to have significantly different force profiles (i.e., locations and magnitudes of the applied forces in comparison to cadavers. In particular, the Laerdal Airway Management Simulator differed in all three measurement variables, namely torque applied on the laryngoscope, force applied at the laryngoscope tip, and force exerted on the simulator's teeth. These findings are further supported by the surveys of the participants in the Laerdal group. For the TruCorp and VBM simulators, significant differences are found only in torque and tip forces, respectively. These results suggest that a simulator that offers more realistic endotracheal intubations may be necessary for airway management training. In addition, this study sets a foundation for future studies to further elucidate the effects of various airway simulators on intubation training.