Southwest Airlines ONT Terminal at Ontario International Airport is a bustling hub that provides a variety of services and amenities to travelers. The terminal has convenient check-in kiosks and ticket booths, allowing for easy boarding and assistance. While waiting for their flights, passengers can enjoy a variety of food and shopping opportunities. Southwest Airlines provides a large choice of domestic routes, making travel both convenient and efficient. Before your trip, check the Southwest Airlines website or the official site of the ONT airport for the most up-to-date flight information.