I am a traveler and recently visited the Delta Airlines ONT Terminal check-in was a breeze thanks to the welcome and friendly personnel. They carefully addressed all of my inquiries and provided insightful details regarding my available flight options. I absolutely enjoyed how short the check-in process was. It was pleasant to unwind in the tidy and cozy terminal while I waited for my flight. My visit went smoothly and was delightful overall. For hassle-free travel, I heartily suggest this terminal to anyone using Delta Airlines!