$139 Cheap Delta flights Washington (DCA) to San Diego (SAN)

View $139 flight on Sat, Nov 8, 2025Opens in a new window

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$139 Cheap Delta flights Washington (DCA) to San Diego (SAN)

Prices were available within the past 7 days and start at $139 for one-way flights and $260 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug 16 - Tue, Aug 19
DCA
Washington
SAN
San Diego
$260 Roundtrip, found 2 days ago
$260
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug 16 from Washington to San Diego, returning Tue, Aug 19, priced at $260 found 2 days ago
Delta
Wed, Sep 3 - Sat, Sep 6
DCA
Washington
SAN
San Diego
$264 Roundtrip, found 3 days ago
$264
Roundtrip
found 3 days ago
Select Delta flight, departing Wed, Sep 3 from Washington to San Diego, returning Sat, Sep 6, priced at $264 found 3 days ago
Delta
Tue, Sep 30 - Sat, Oct 4
DCA
Washington
SAN
San Diego
$277 Roundtrip, just found
$277
Roundtrip
just found
Select Delta flight, departing Tue, Sep 30 from Washington to San Diego, returning Sat, Oct 4, priced at $277 just found
Flights from Washington (DCA) to Carlsbad (CLD)
Origin airport
Ronald Reagan Washington National
Destination airport
McClellan-Palomar
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Popular airline
Alaska Airlines
Distance
2265 mi
Average flight time
4 hours 44 mins

Frequently asked questions

How much is a Delta Air Lines flight from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
You'll discover budget-friendly return Delta Air Lines flights from $260 from DCA to SAN by filtering your results from "Price (lowest to highest)" on Expedia. Or look for deals from $139 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from DCA to SAN with Delta Air Lines?
Delta Air Lines flights to San Diego are often more affordable in the quieter months of January and November. Whether you're after a one-way or a return ticket, you could find a better deal then.
What is the cheapest time to book flights from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN) with Delta Air Lines?
Search for affordable Delta Air Lines flights from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and itinerary, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
Enter your dates, hit search and use the "Nonstop" filter on Expedia to browse any direct flights from DCA to SAN with Delta Air Lines or another carrier.
What is the earliest Delta Air Lines flight from DCA to SAN?
To find the earliest departure from DCA to SAN with Delta Air Lines, filter your search by "Early Morning" and "Morning." Choosing an early flight usually means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in San Diego?
San Diego Intl. Airport (SAN) is the main San Diego gateway for Delta Air Lines flights from Ronald Reagan Washington National Airport (DCA).
Why fly with Delta Air Lines from DCA to SAN?
Jetting off from DCA to SAN with Delta Air Lines means enjoying a host of perks, such as a rewarding loyalty program and an excellent in-flight experience. Plus, when booking through Expedia, One Key™ members can earn OneKeyCash™* to spend on select future travel purchases. That's on top of the Delta SkyMiles points you can earn with Delta Air Lines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Ronald Reagan Washington National Airport (DCA) to San Diego Intl. Airport (SAN)?
Typically, you can reschedule or cancel your flight, although additional fees may apply if your booking was made over 24 hours ago. Need to keep your options open? Make use of our "No cancel fee" and "Changes included" filters to find flights that won't charge you extra if you have to revise your plans. To update your booking, head to "Trips," select your flight and click on "Manage Booking" for further information.

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*Available to One Key members.