Whether you're going on a holiday or taking a quick city break, you can be sure Opodo has your best ticket to Ontario, CA. Search, compare and get great deals on your air ticket thanks to our speedy search engine and large selection of cheap flights from both standard and low cost airlines. How easy is booking a holiday with Opodo, exactly? Well, it is as quick and simple as indicating your travel dates, choosing a departure time that best fits your needs, then selecting number of layovers, and finally, deciding on whether or not to include any additional perks like car or hotel. And just like that, your holiday booking is complete and you are on your way to a holiday in Ontario, CA!