Flying from Ontario to San Diego can be expensive. Our search helps you compare cheap flights, airfare deals, and flight tickets across airlines and agencies so you can book at the best price.
We scan trusted travel agencies and airline booking systems for the route Ontario - San Diego (ONT - SAN). We do not sell tickets or add fees - you choose where to buy.
Airfares vary by date, time, and airport. Use filters to find the best option by departure/arrival time, number of stops, airline or alliance, and booking channel.
If your dates are flexible, check the low-fare calendar to find the cheapest days. Booking round-trip in one order often reduces fees, and prices usually rise as departure approaches.
We also recommend you to look through the prices for return tickets from San Diego to Ontario.
Prices shown are based on searches from the last few days. Ticket prices can change and depend on availability at the time of booking.
Frequently asked questions about flights from Ontario to San Diego
How long does the flight from Ontario to San Diego take?
Flight duration from Ontario to San Diego varies by route, airline, and number of stops. Direct flights are faster. Use our search to compare options.
Are there direct flights from Ontario to San Diego?
Availability of direct flights from Ontario to San Diego depends on the route and season. Use the "Direct" filter in search to see only direct options.
Which airlines fly from Ontario to San Diego?
Several airlines operate flights from Ontario to San Diego. On this page you see airlines serving this route. Our search compares prices across airlines and agencies.
What is the cheapest month to fly from Ontario to San Diego?
Prices from Ontario to San Diego vary by month and demand. On this page you see average prices by month. Use the low-fare calendar and monthly table to find the cheapest dates.