Cheap flights from San Diego to Washington, D.C. from $142

The month of January is, on average, the cheapest month to fly to Washington, D.C. Reagan-National Airport from San Diego, with most prices found around $296. If you aren’t able to travel to Washington, D.C. Reagan-National Airport during the month of January, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $311.

The cheapest day to depart from San Diego to Washington, D.C. Reagan-National Airport is on a Friday. Travelers who choose to depart for Washington, D.C. Reagan-National Airport on a Friday will often find tickets for as low as $318. Flights from San Diego to Washington, D.C. Reagan-National Airport on a Sunday will generally be more expensive and average around $487. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our data shows that the cheapest San Diego to Washington, D.C. Reagan-National Airport flights are usually those with departure times in the morning. Our users have found flights to Washington, D.C. Reagan-National Airport in the morning for as low as $353. In contrast, the most expensive time of day to depart to Washington, D.C. Reagan-National Airport is at noon when prices are around $360.

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

You are more likely to see cheaper flights to Washington, D.C. Reagan-National Airport from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Reagan-National Airport for around $347 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Reagan-National Airport from San Diego for as low as $298 on momondo.

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

No. A direct flight is the cheapest option for a flight between San Diego to Washington, D.C. Reagan-National Airport.

As of February 2026, prices for San Diego to Washington, D.C. Reagan-National Airport flights are approximately 18% more expensive when compared to flights at the same time last year.

Delta is the most popular carrier operating from San Diego to Washington, D.C. Reagan-National

Frontier, American Airlines and Alaska Airlines are the top three most popular airlines that fly to Washington, D.C. Reagan-National Airport from San Diego according to our data. Frontier is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Washington, D.C. Reagan-National Airport. Keep in mind that there are 7 different airlines that fly to Washington, D.C. Reagan-National Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 26% 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 142 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Saturday 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, Alaska Airlines have had the least number of delays on this route over the last 12 months; with about 26% of their flights experiencing any sort of delay.

Denver (DEN) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Denver (DEN) offer the lowest average round-trip price of $193.

Flights connecting via Detroit (DTW) have the shortest average one-way travel time: 7h 17m.

Detroit (DTW) has the shortest average layover time for this route: 1h 21m.

As of February 2026, there are 2 flights per day flying from San Diego to Washington, D.C. Reagan-National Airport. The most common time of day flights depart is 12:00PM, with 81% of flights taking off in the afternoon.

As of February 2026, 20 flights take off from San Diego and land in Washington, D.C. Reagan-National Airport each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.