SFO Terminal Frontier Airlines is perfect for travelers looking to stretch their dollars without sacrificing convenience. As an ultra-low-cost carrier, Frontier provides competitive fares with the option to add extras like checked baggage and seat selection. The terminal itself is well-equipped for a smooth journey, featuring streamlined security checks, self-check-in kiosks, and comfortable waiting areas. Dining and retail options are available for last-minute snacks or shopping. Whether you’re a frequent flyer or taking a one-time trip, united airlines terminal phx offers a practical and affordable way to reach your next destination.