Find great value on US Airways flights from PHX to ONT when you book with CheapOair! Connected with all major cities, Ontario is a joyous destination to visit. It is situated in south west San Bernardino County, California, United States. History and art lovers should head straight to the Museum of History and Art. Operated by the city of Ontario, this museum showcases the interpretative exhibits within the south ring that focuses on the local and regional history. Road Ways and Gem of the Foothills are the most popular exhibitions of this museum. Take a tour of the San Antonio Winery, it is one of the oldest wine regions of California. Tasting rooms, vineyards and numerous wine shops are the major highlights of this winery. For shopaholics, the Ontario Mills Mall is an excellent choice for fulfilling your shopping needs.