Travelers flying with Southwest Airlines at Ontario International Airport will depart from Terminal 4, a modern and passenger-friendly terminal. The terminal offers streamlined check-in services, including mobile check-in and bag drop options that save time. Clear signage throughout Southwest Airlines ONT Terminal makes navigation easy from security to boarding gates. Once inside, passengers can relax in comfortable waiting areas or choose from several food and beverage outlets. Free Wi-Fi and charging points are available, allowing travelers to stay connected before departure. Southwest’s gates are efficiently managed, and announcements are timely and easy to follow. Families, business travelers, and leisure passengers alike appreciate the calm atmosphere and practical design. With convenient access to parking structures and public transportation, Southwest Airlines at ONT Terminal 4 provides a reliable and stress-free airport experience.