$100 Cheap Flights from Washington (DCA) to San Diego (SAN)

View $100 flight on Thu, Nov 27, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)

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Cheap Flights from Washington to San Diego (DCA-SAN)

Prices were available within the past 7 days and start at $100 for one-way flights and $225 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Tue, Aug 19 - Sat, Aug 23
DCA
Washington
SAN
San Diego
$225 Roundtrip, found 3 hours ago
$225
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Tue, Aug 19 from Washington to San Diego, returning Sat, Aug 23, priced at $225 found 3 hours ago
Frontier Airlines
Sat, Aug 23 - Mon, Aug 25
DCA
Washington
SAN
San Diego
$230 Roundtrip, found 5 hours ago
$230
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, Aug 23 from Washington to San Diego, returning Mon, Aug 25, priced at $230 found 5 hours ago
Frontier Airlines
Wed, Sep 10 - Sat, Sep 13
DCA
Washington
SAN
San Diego
$233 Roundtrip, found 3 hours ago
$233
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Wed, Sep 10 from Washington to San Diego, returning Sat, Sep 13, priced at $233 found 3 hours ago
Frontier Airlines
Sat, Aug 16 - Fri, Aug 22
DCA
Washington
SAN
San Diego
$235 Roundtrip, found 5 hours ago
$235
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Sat, Aug 16 from Washington to San Diego, returning Fri, Aug 22, priced at $235 found 5 hours ago
Frontier Airlines
Mon, Sep 8 - Sat, Sep 13
DCA
Washington
SAN
San Diego
$236 Roundtrip, found 4 days ago
$236
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Mon, Sep 8 from Washington to San Diego, returning Sat, Sep 13, priced at $236 found 4 days ago
Alaska Airlines
Sat, Aug 16 - Sat, Aug 23
DCA
Washington
SAN
San Diego
$237 Roundtrip, just found
$237
Roundtrip
just found
Select Alaska Airlines flight, departing Sat, Aug 16 from Washington to San Diego, returning Sat, Aug 23, priced at $237 just found
Southwest Airlines
Wed, Aug 20 - Sat, Aug 23
DCA
Washington
SAN
San Diego
$241 Roundtrip, found 3 hours ago
$241
Roundtrip
found 3 hours ago
Select Southwest Airlines flight, departing Wed, Aug 20 from Washington to San Diego, returning Sat, Aug 23, priced at $241 found 3 hours ago
Southwest Airlines
Tue, Oct 28 - Sat, Nov 1
DCA
Washington
SAN
San Diego
$242 Roundtrip, found 6 days ago
$242
Roundtrip
found 6 days ago
Select Southwest Airlines flight, departing Tue, Oct 28 from Washington to San Diego, returning Sat, Nov 1, priced at $242 found 6 days ago
Delta
Wed, Aug 20 - Sat, Aug 23
DCA
Washington
SAN
San Diego
$251 Roundtrip, found 3 hours ago
$251
Roundtrip
found 3 hours ago
Select Delta flight, departing Wed, Aug 20 from Washington to San Diego, returning Sat, Aug 23, priced at $251 found 3 hours ago
American Airlines
Mon, Nov 24 - Thu, Nov 27
DCA
Washington
CLD
Carlsbad
$253 Roundtrip, found 3 days ago
$253
Roundtrip
found 3 days ago
Select American Airlines flight, departing Mon, Nov 24 from Washington to Carlsbad, returning Thu, Nov 27, priced at $253 found 3 days ago

Find the cheapest month to fly from Washington (DCA) to San Diego (SAN)

October is typically the cheapest month to fly

From $138 - $370 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Diego

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to General Abelardo L. Rodriguez Intl. TIJ. Average driving time to city center is 26 minutes. Flights from $619
TIJ
General Abelardo L. Rodriguez Intl.
Average driving time to city center26 min
Flights from $619
Select flight to McClellan-Palomar CLD. Average driving time to city center is 38 minutes. Flights from $417
CLD
McClellan-Palomar
Average driving time to city center38 min
Flights from $417
Flights from Washington (DCA) to San Diego (SAN)
Origin airport
Ronald Reagan Washington National
Destination airport
San Diego Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$219
Distance
2271 mi
Average flight time
5 hours 12 mins

Washington to San Diego Flights

The cheapest times to fly from Washington to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to San Diego are during the month of August. You can find some of the cheapest flights from Washington to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to San Diego

Sunday is one of the best days to book for cheap flights from Washington to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $100 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN) cost?
Cheap round-trip flights from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN) start from $196. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Alaska Airlines flight leaving DCA on July 25 2025 and touching down at SAN. The price was last updated on June 30 2025 and has not changed since.
What is the cheapest month to fly from DCA to SAN?
The cheapest flights from DCA to SAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
There are no direct flights from Washington, DC (DCA-Ronald Reagan Washington National) to San Diego Intl. Airport (SAN). However, you'll find other airports with nonstop flights. Board your plane at Washington Dulles Intl. Airport (IAD) and head straight to San Diego without a layover.
What is the cheapest airline that flies from DCA to SAN?
Currently, the cheapest airline operating one-way flights from DCA to SAN is Alaska Airlines. You can book a seat on this route from $119. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from DCA on September 24 2025. Prices were last updated on June 30 2025 and have not changed since.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
You'll have to take a flight with a layover if you're traveling from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN). Direct flights don't operate daily on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from DCA to SAN?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can vary depending on a number of factors, such as the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
To land at San Diego Intl. Airport (SAN) on time, pick a flight that leaves Ronald Reagan Washington National Airport (DCA) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN) last-minute?
Last-minute fares from DCA to SAN are generally more expensive. To lock in the lowest prices, start looking for flights ahead of time. That being said, if your travel plans are flexible, you may land a cheap fare right before your trip.
Is it cheaper to book a DCA to SAN flight and hotel package?
You'll typically save money by booking a DCA to SAN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After selecting your ideal accommodations and flights, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
If you booked your DCA to SAN flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

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