Ontario, California is located in San Bernardino County and is part of the region known as "The Inland Empire." The city offers many entertainment options and plenty of leisure attractions that are sure to meet any needs or desires you might have while you are visiting.
Be sure to take some time to visit the Museum of History and Art that features exhibits on the history or the town as well as the citrus industry. GameWorks offers a day full of fun, food and entertainment. The historic Graber Olive House has been producing olives since 1894. It is definitely a treat you don't want to miss.
The climate in Ontario is usually moderate with low humidity and is considered much like a Mediterranean climate. Summer highs can climb up close to 100F. The winter low are very mild and usually remain above 45F. The mild weather makes it a great location for citrus growers. The average of 312 days of sunshine makes it a great place to enjoy the outdoors.
There are plenty of cheap flights to Ontario, California available at many different sources (including through online services). You can find cheap airline tickets from New York to Ontario International Airport (ONT) starting around $250 US. Cheap airline tickets from Los Angeles can before for around $200 US.
You can find cheap hotels in Ontario that will fit almost any taste or budget. Cheap hotel rooms are available near the heart of the city with rates starting under $100 US.