United Airlines operates from the Terminal of Phoenix Sky Harbor International Airport (PHX). This terminal is well-known for its modern design and convenient layout, which provide passengers with a more streamlined experience United Airlines PHX Terminal operates domestic and international flights from this location, serving popular destinations throughout the United States and internationally. Travelers can enjoy a range of amenities, such as dining options, shopping, and seating places, to make their stay at the airport more comfortable. United's check-in offices, luggage services, and boarding gates are conveniently located within Terminal 3, offering a smooth travel experience for all travelers.