Welcome! Flying Frontier Airlines PHX Terminal out of Phoenix Sky Harbor International Airport (PHX) Terminal 3, you have a low-cost, convenient flight to look forward to. With Frontier, it's low cost with added options that you can personalize, all through streamlined service, an added perk of budget air for frugal travelers. PHX Terminal 3 offers a modern and spacious environment, featuring plenty of dining options, shopping outlets, charging stations, and relaxing seating areas to enhance your airport experience. With efficient self-service kiosks, smooth security lines, and an easy boarding process, everything is designed to keep your trip stress-free. Plus, Frontier's eco-friendly approach to flying means you're choosing an airline committed to sustainability.