The best pricing can be found in the month of April. Prices to San Diego from Ontario average $154. You can even find prices in April for less than $154, as users have found deals to San Diego from as low as $75. The month of September appears to be one of the more expensive times to travel to San Diego from Ontario. Flying in the targeted month can save you up to 36%.
Find a great deal and save up to 60% by booking at least 43 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Ontario to San Diego within the next two weeks, with the cheapest ticket starting at $173.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to San Diego as you normally would.