Terminal 3 at Phoenix Sky Harbor International Airport is where Frontier Airlines PHX Terminal is based. Check-in desks, self-service kiosks, and security checks are just a few of the services the terminal provides to provide a seamless travel experience. Free Wi-Fi, a variety of food options, and retail stores are also available to passengers. From check-in to boarding, passengers flying with Frontier Airlines can be sure of a smooth and enjoyable experience thanks to Terminal 3’s effective layout and amenities.