Cheap flights from Ontario to San Diego (ONT - SAN) from $171

Currently, October is the cheapest month in which you can book a flight from Ontario to San Diego (average of $288). Flying from Ontario to San Diego in July is currently the most expensive (average of $356). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

• Can I find flights from Ontario to San Diego for under $400 on Cheapflights?

  Yes, there are multiple flights from Ontario to San Diego for under $400. The cheapest flight booked recently is on United Airlines for just $383, but on average you can expect to pay $727.

• Are there last-minute flights available from Ontario to San Diego for under $600?

  There are currently 7+ open flights from Ontario to San Diego within the next 7 days for less than $600.

• What are the cheapest airlines flying from Ontario to San Diego round-trip?

  Cheapflights users have booked flights from Ontario to San Diego round-trip from $383. Other airlines that can offer you cheap pricing are Alaska Airlines, from $472, and American Airlines, from $855.

• What are the cheapest airlines to fly from Ontario to San Diego one-way?

  To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $171. United Airlines flights start at $197 while deals on American Airlines start at $508 one-way.

• What does ONT to SAN mean?

  These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Ontario Airport to San Diego Airport flight would often be abbreviated as a ONT to SAN flight.

• Can I find deals for flights from Ontario to San Diego that include extra baggage allowance?

  The amount of baggage you can bring on your Ontario to San Diego flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

• Can I find deals on flights from Ontario to San Diego with specific airlines?

  Yes, Cheapflights allows you to browse and filter Ontario to San Diego flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

• Can I find deals for flights from Ontario to San Diego that include hotel bookings?

  Yes. In addition to deals on Ontario to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

• How can I find direct flights from Ontario to San Diego?

  After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to San Diego.

• Can I find deals for business class flights from Ontario to San Diego?

  Yes. Cheapflights offers flight deals from Ontario to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

• Can I find deals for flights from Ontario to San Diego that allow pets onboard?

  Many airlines flying from Ontario to San Diego offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

• Can I find deals on last-minute flights from Ontario to San Diego?

  Yes, you can often find last-minute deals on Ontario to San Diego flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

• How recently were the Ontario to San Diego flight deals updated?

  The Ontario to San Diego flight deals you see on this page were last updated on 5/18.