Southwest Airlines ONT Terminal is located in Terminal 4 at Ontario International Airport. This terminal provides a wide range of passenger amenities, including check-in counters, baggage claim, and food outlets. Travelers can take advantage of convenient features like free Wi-Fi, retail stores, and comfy seating places. Southwest Airlines provides convenient parking and ground transportation choices, making it simple for passengers to get to and from the airport. The terminal is built for efficiency, resulting in a seamless and hassle-free travel experience.