Cheap flights from Washington to San Diego from $58

If you are unable to visit San Diego during the month of January, then departing from State of Washington during the month September is also very affordable. Most momondo users find prices during this month for around $221.

The cheapest day to depart from State of Washington to San Diego is on a Wednesday. Travelers who choose to depart for San Diego on a Wednesday will often find tickets for as low as $264. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $302. 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 $288. Flights in the evening are often more expensive with an average ticket price of $298.

Fly from Seattle/Tacoma Intl to San Diego for the best Washington - San Diego flight prices

You are more likely to see cheaper flights to San Diego from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $278 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from State of Washington for as low as $229 on momondo.

There are 4 cabin classes available to choose from on State of Washington 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, Southwest, and Delta are the most popular carriers operating from Washington to San Diego

Alaska Airlines, Delta and Southwest are the top three most popular airlines that fly to San Diego from State of Washington according to our data. Alaska Airlines is the first choice among our users, with 57% of people opting to fly with this airline when traveling to San Diego. Keep in mind that there are 8 different airlines that fly to San Diego on a routine basis, so you have a few additional options to choose from.

The number of flights available between State of Washington and San Diego is 42 per day as of August 2026. The most frequent departure time is 7:00PM, with 39% of daily flights leaving in the afternoon.

The number of flights available between State of Washington and San Diego is 295 per week as of August 2026. The most frequent departure day is Sun, with 21% of weekly flights leaving on this day.