Southwest Airlines ONT Terminal +1-888-738-0817

Southwest Airlines operates from Terminal 4 at Ontario International Airport (ONT), offering travelers a smooth and efficient airport experience. Terminal 4 is designed with convenience in mind, featuring easy check-in counters, self-service kiosks, and friendly Southwest Airlines ONT Terminal staff ready to assist passengers. Security screening is typically quick and well-organized, helping travelers move comfortably toward the departure gates. Inside the terminal, passengers can enjoy a variety of dining options, grab-and-go snacks, and seating areas with charging stations. The terminal layout is simple to navigate, making it ideal for families and first-time flyers. Southwest’s boarding process is clearly announced, and gate areas are spacious and clean. With nearby parking facilities, rental car services, and ground transportation access, Terminal 4 ensures a hassle-free start or end to any Southwest Airlines journey at ONT.