I just passed through the Southwest Airlines ONT Terminal and it was a good experience. The terminal is well-organized and simple to navigate, with good signage. Check-in was quick, and the security process went smoothly. There is plenty of seating available, and I loved the variety of food and beverage options. The personnel were polite and efficient, making the experience stress-free. Overall, the Southwest terminal at ONT provides a comfortable and convenient travel experience. I would absolutely fly from here again.