United Airlines CUN Terminal International Airport. Find information about the CUN terminal of United Airlines check-in processes, facilities, lounges, and services. With information on flight times, luggage handling, and terminal navigation, you can easily plan your trip and avoid any hassles. Discover everything you need to know about United Airlines operations at this busy Mexican airport, whether you're traveling there or just arriving. Make the most of your trip at the Cancun Terminal with United Airlines by being well-informed and organized for a hassle-free and pleasurable journey.