Spirit Airlines PHX Terminal , At Phoenix Sky Harbor International Airport (PHX), Spirit Airlines operates out of Terminal 4. This terminal is the airport’s primary hub for domestic and international flights. Passengers flying with Spirit Airlines will find a range of amenities including dining options, shopping, and lounges. The terminal is equipped with efficient security checkpoints and clear signage to guide travelers to their gates. For check-in, Spirit offers both self-service kiosks and ticket counters. To stay updated on your flight status, keep an eye on the departure boards located throughout the terminal. Enjoy your journey with Spirit Airlines from PHX Terminal 4!