Cheap flights from California to San Diego from $43

If you are unable to visit San Diego during the month of July, then departing from California during the month August is also very affordable. Most momondo users find prices during this month for around $173.

The cheapest day to depart from California to San Diego is on a Thursday. Travelers who choose to depart for San Diego on a Thursday will often find tickets for as low as $191. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $457. These prices are subject to change though, so be sure to set up a Price Alert for flights to San Diego.

The cheapest time of day to fly to San Diego is in the morning when flights can be purchased for as low as $239. Flights in the evening are often more expensive with an average ticket price of $277.

Fly from Oakland to San Diego for the best California - San Diego flight prices

You are more likely to see cheaper flights to San Diego from California when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $242 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from California for as low as $179 on momondo.

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from California to San Diego

Southwest, Alaska Airlines and United Airlines are the top three most popular airlines that fly to San Diego from California according to our data. Southwest is the first choice among our users, with 33% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 9 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

165 flights are operational daily from California to San Diego as of May 2026. The most popular departure time for this route is 4:00PM, with 37% of flights per day taking off in the afternoon.

As of May 2026, there are 1,157 flights per week flying from California to San Diego. The most common day of the week flights depart is Sun, with 20% of flights taking off on this day.