Southwest Airlines arrive at Terminal 4 of ONT Airport. By reaching the concerned building, passengers can complete necessary tasks such as check-in and printing boarding passes before getting on the plane. The airline operates non-stop and direct flights to numerous destinations. All such flights depart and arrive from the same terminal at the airport. Check out what other services and amenities you can find at the airport building.
Southwest Airlines operates out of Terminal 4 for flight departures and arrivals. The infrastructure is designed in a way that caters to every requirement of arriving and departing passengers. International travelers can head to different hallways to complete their immigration and customs duties after deboarding the plane.
Proper navigation of the terminals is crucial to board your flight right on time. Having the right information will help you find your way to the Southwest Airlines Ontario Terminal building. Not only that, but you can also locate the available services and elevate the traveling experience. Please avoid unnecessary hassle and delays.
| Name of the Airport | Ontario International Airport |
| Airport Address | 2900 E. Airport Drive, Ontario, CA 91761 |
| Southwest Airlines Terminal for Departing Flights | Terminal 4 |
| Southwest Airlines Terminal for Arriving Flights | Terminal 4 |
| Airport Code | ONT |
| Airport Contact Number | (909) 544-5459 |
| Airport ICAO Code | KONT |
| Serves | Inland Empire and Greater Los Angeles metro areas |
| Official Website of the Airport | https://www.flyontario.com/ |
You are bound to have a smooth and effortless experience with every turn you take at Southwest Airlines ONT. Services, amenities, and a great selection of food are offered to Southwest passengers. Basic passenger facilities include a ticketing counter, helpdesk, kiosk machines, washrooms, etc. Alongside, there are other entertainment options to hype up your mood.

If you lost an article at the airport, you can get in touch with the Lost and Found office at ONT. It is open Monday to Friday, 9 AM to 6 PM (PST). The staff will guide you through the process and formalities and help you trace the missing item.
Frustrated by airport hustle and bustle? Airport and airline lounges are your getaway. The Aspire Lounge is open to all travelers departing from ONT Terminal 4, including Southwest passengers. You can access it anytime from 5 a.m. to 6 p.m. daily for an admission fee of $37 per head. The space is equipped with a variety of amenities, which will help you unwind and fuel up for the flight.
There are plenty of escalators and elevators at the airport for easy navigation through the terminal. Plus, passengers with reduced mobility can quickly move around the airport. More importantly, inter-terminal transportation is made easier if you have a connecting flight departing from a different terminal.
It is lovely to travel with your furry friend, but the unavailability of pet-friendly stops can really ruin the trip. You can locate pet relief stations both outside and inside the Southwest terminal at Ontario International Airport. These spaces are known as “Barking Lots” and are situated at gate 410.
Once you enter the right terminal building, you can check in for the Southwest flight. You can either head to designated airline counters or use kiosk machines to complete the job. When you are going through the check-in formality, you issued a boarding board, which is a necessary document to board the plane.
Southwest ticket office at Ontario Airport will help you with flight change and cancellation queries. The same services are available online on their official website. However, if you prefer face-to-face communication, you can definitely visit the airport desk for assistance. The staff is well-versed in the airline’s policy, so you will be under the right guidance when uncertainty knocks on the door.
Aside from basic passenger services, you get amenities like internet connection, ATMs, retail, food, and beverages. The complete list is stated in the table below:
| Airport Map | Free Internet Connection | Hotel Accommodation | Washrooms |
| Family Toilets and Restrooms | Escalators and Elevators | Aspire Lounges | USO Lounge |
| Pet Relief Areas | Nursery Station for Lactating Mothers | Hydration Station | Parking Area |
| Folding Changing Tables | Play Area for Children | ATMs | Currency Exchange |
| Lost and Found | Battery Charging Stations | Water Filling Stations | Baggage Carts |
| Postal Services | Transportation Facilities | Smoking Areas | Information Desk |
| Car Rental | Medical Assistance | Emergencies Services | Restaurants and Food Options |
| Duty-free Stores | Retail Stores | Art and Exhibits | Convenience Stores |
Southwest Airlines flights take off and land at terminal 4 of Ontario International Airport.
Passengers departing on Southwest flights must arrive and check in at the Ontario Airport Terminal 4 building.
Dial (909) 544-5459 to speak with the Southwest representative staff sitting at the Ontario Airport desk.
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