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Southwest Airlines ONT Terminal is a bustling hub at Ontario International Airport that provides travelers with a variety of services and amenities. 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.