Cheap flights from Austin to San Diego from $42

If you are unable to visit San Diego during the month of January, then departing from Austin during the month February is also very affordable. Most momondo users find prices during this month for around $246.

The cheapest day to depart from Austin 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 $312. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $415. 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 afternoon when flights can be purchased for as low as $304. Flights in the morning are often more expensive with an average ticket price of $370.

Fly from Austin Bergstrom to San Diego for the best Austin Bergstrom - San Diego flight prices

You are more likely to see cheaper flights to San Diego from Austin when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $309 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Austin for as low as $257 on momondo.

There are 4 cabin classes available to choose from on Austin to San Diego flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Alaska Airlines and Southwest are the most popular carriers operating from Austin Bergstrom to San Diego

Southwest, American Airlines and Frontier are the top three most popular airlines that fly to San Diego from Austin according to our data. Southwest is the first choice among our users, with 45% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 7 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

Denver (DEN) was the most common stop: 91% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $254.

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 5h 43m.

Phoenix (PHX) has the shortest average layover time for this route: 2h 00m.

As of October 2026, there are 4 flights per day flying from Austin to San Diego. The most common time of day flights depart is 6:00AM, with 40% of flights taking off at noon.

As of October 2026, 31 flights take off from Austin and land in San Diego each week. The most common flight departure day for this route is Fri, with 48% of weekly flights taking off on this day.