Cheap flights from Washington, D.C. to San Diego from $109

If you are unable to visit San Diego during the month of January, then departing from Washington, D.C. during the month August is also very affordable. Most momondo users find prices during this month for around $357.

The cheapest day to depart from Washington, D.C. 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 $387. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $470. 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 evening when flights can be purchased for as low as $387. Flights at noon are often more expensive with an average ticket price of $542.

Fly from Baltimore/Washington to San Diego for the best Washington, D.C. - San Diego flight prices

You are more likely to see cheaper flights to San Diego from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to San Diego for around $398 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Diego from Washington, D.C. for as low as $340 on momondo.

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

You could potentially save up to 6% on your flight if you consider stops on a Washington, D.C. to San Diego flight.

As of April 2026, prices for Washington, D.C. to San Diego flights are approximately 166% more expensive when compared to flights at the same time last year.

Delta, Southwest, and United Airlines are the most popular carriers operating from Washington, D.C. to San Diego

United Airlines, Southwest and Alaska Airlines are the top three most popular airlines that fly to San Diego from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 38% 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.

Denver (DEN) was the most common stop: 59% of momondo users choosing 1-stop flights on this route connected there.

Flights via Dallas (DFW) offer the lowest average round-trip price of $174.

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 7h 20m.

Chicago (ORD) has the shortest average layover time for this route: 1h 05m.

As of April 2026, 11 flights take off from Washington, D.C. and land in San Diego each day. The most common flight departure time for this route is 5:00PM, with 55% of daily flights taking off in the afternoon.

As of April 2026, there are 80 flights per week flying from Washington, D.C. to San Diego. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.