- It was easy and fun to fly with my family on Frontier Airlines PHX Terminal. Thanks to the self-service kiosks and the friendly staff, the check-in process was quick and simple. Terminal 3 was spotless, roomy, and offered excellent dining options. Security was also quick. The Frontier crew was amiable and helpful, and the boarding process was well-organized, guaranteeing a comfortable trip. The seats were comfortable for the brief journey, and the flight was on time. Frontier made our trip stress-free with its reasonable prices and quick service at PHX Terminal 3. No problem, we'd fly with them once more!