When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 27% on flights from Ontario to San Diego compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $73. For sooner than that we have options available in the next 3 days from $98.
Flights from Ontario to San Diego lean towards being more expensive in December. Prices are generally better when you fly from Ontario to San Diego in July, with the cheapest ticket starting at $44.
When flying from Ontario to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.