Southwest Airlines Southwest Airlines ONT Terminal stands out for its frequent flights, customer-friendly policies, and reliable service. Operating primarily out of Terminal 4, Southwest offers travelers a seamless journey from check-in to arrival.

Terminal Overview

This terminal is well-equipped and thoughtfully designed to cater to both leisure and business travelers. It features a clean, modern layout with clear signage, wide walkways, and easily accessible amenities. From the moment passengers arrive at the terminal, the Southwest experience is marked by efficiency and friendly service.

Check-In and Security

Southwest passengers can take advantage of multiple check-in options, including staffed counters, self-service kiosks, and curbside bag check. The check-in area at Terminal 4 is located just inside the main entrance, making it easy to navigate.

Terminal Amenities

Inside Terminal 4, Southwest passengers will find a range of amenities to enhance their airport experience. There are several food and beverage options, including fast-casual restaurants, coffee shops, and grab-and-go stations. Popular choices like Dunkin’, Einstein Bros. Bagels, and Cross Grain Brewhouse give travelers plenty of ways to enjoy a meal or snack before boarding. The terminal also offers free high-speed Wi-Fi, ample charging stations, clean restrooms, and plenty of comfortable seating near the gates.

Gate and Boarding Experience

Southwest flights typically depart from gates in the central area of Terminal 4. Boarding begins approximately 30 minutes before departure, following the airline’s well-known group boarding process. Thanks to ONT’s compact size and efficient gate area, travelers can reach their flights quickly without the need for long walks or trams. Families, senior travelers, and those needing extra assistance will find ONT’s Southwest terminal easy to navigate, with staff readily available to provide help.

Arrivals and Baggage Claim

For arriving passengers, the experience is just as convenient. Southwest’s baggage claim area is located on the lower level of Terminal 4, with clearly marked carousels and real-time display boards showing the status of arriving flights. Bags are typically delivered promptly, reflecting ONT’s reputation for fast turnaround times.Just outside the terminal, passengers can find a range of ground transportation options, including rental car shuttles, rideshare pick-up zones, taxis, and public buses. ONT’s layout makes it easy to transition from air travel to your next destination without long waits or confusing signage.

Destinations and Frequency

Southwest Airlines offers a wide selection of nonstop routes from ONT to major cities across the United States. Popular destinations include Las Vegas, Phoenix, Denver, Dallas, Sacramento, Oakland, and Chicago, among others. With frequent daily departures and competitive fares, Southwest provides a reliable option for both short-haul and cross-country travel .Business travelers appreciate the airline’s flexibility with no change fees, two free checked bags, and Rapid Rewards points that add up quickly. Leisure travelers enjoy the laid-back approach and friendly crew that Southwest is known for.

Why Choose Southwest at ONT?

Choosing Southwest Airlines from Ontario International Airport combines the best of both worlds: a leading low-cost carrier and a highly convenient airport. Compared to the congestion and longer wait times at LAX, ONT offers faster check-in, quicker security screening, and shorter distances between gates and amenities. For travelers in the Inland Empire, eastern Los Angeles County, and even parts of Orange County, ONT is a stress-free alternative that doesn’t sacrifice airline quality. Add to that Southwest’s consistent record of on-time departures and arrivals, and it’s easy to see why many passengers prefer this pairing.

Final Thoughts

Whether you're flying for business, vacation, or a quick weekend getaway, Southwest and Terminal 4 at ONT make for a smooth and satisfying journey. With comfortable facilities, attentive staff, and a growing list of nonstop destinations, Southwest at ONT continues to be a top choice for savvy Southern California flyers.