I am a traveler and recently the Southwest Airlines ONT Terminal and simple check-in was made possible by the kind staff. The terminal had many charging stations, comfortable seats, and was tidy and pleasant. The variety of food selections allowed me to kill time as I awaited my flight, which I appreciated. I had no trouble finding my way thanks to the signs and the serene ambiance. It made my flight more enjoyable, thus I would highly suggest this terminal to anyone flying with Southwest.
