Cheap flights from San Diego to Washington, D.C. from $80

The month of August is, on average, the cheapest month to fly to Washington, D.C. from San Diego, with most prices found around $277. If you’re not able to fly to Washington, D.C. in August, then May is your next best option. Flight prices from San Diego to Washington, D.C. during May average around $317.

On average, the least expensive day to fly to Washington, D.C. from San Diego is on a Friday. momondo users have found tickets for Friday departures for as low as $395. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from San Diego to Washington, D.C. for around $605.

At noon is the cheapest time of day to fly from San Diego to Washington, D.C. when you can find flight prices for as low as $394. Flying to Washington, D.C. at noon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the evening because they tend to be around $471. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Washington, D.C. from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $385 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from San Diego for as low as $309 on momondo.

There are 4 cabin classes available to choose from on San Diego to Washington, D.C. 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 3% on your flight if you consider stops on a San Diego to Washington, D.C. flight.

As of March 2026, prices for San Diego to Washington, D.C. flights are approximately 14% more expensive when compared to flights at the same time last year.

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

United Airlines, Southwest and Alaska Airlines are the top three most popular airlines that fly to Washington, D.C. from San Diego according to our data. United Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 9 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between San Diego and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 143 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the evening have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Las Vegas (LAS) was the most common stop: 58% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $242.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 7h 14m.

Detroit (DTW) has the shortest average layover time for this route: 1h 01m.

12 flights are operational daily from San Diego to Washington, D.C. as of March 2026. The most popular departure time for this route is 8:00AM, with 56% of flights per day taking off at noon.

As of March 2026, there are 85 flights per week flying from San Diego to Washington, D.C.. The most common day of the week flights depart is Thu, with 20% of flights taking off on this day.