United Airlines MIA Terminal the Miami International Airport's (MIA) Terminal C is home to United Airlines. Both domestic and international flights may be easily accessed from Terminal C, which is a section of the Central Terminal. Modern amenities at the terminal include culinary options, retail stores, and cozy sitting. Priority boarding for qualified passengers, baggage drop services, and self-service kiosks are all available to United passengers. In order to give yourself enough time for security checks and boarding, it is advised to arrive at least two hours before to departure for domestic flights and three hours prior to departure for international ones.