Washington (IAD) to San Diego (SAN) flight deal from $217 USD in economy class

UAUnited Airlines

Round Trip•Economy

IAD

Washington Dulles International Airport

Washington, United States

SAN

San Diego International Airport

San Diego, United States

$334 USD

-35%$217 USD

Verified Nov 2, 2025 at 12:11 PM

December 2025

Today

Mon

Tue

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Sat

Sun

1$340 2$280 3$217 4$237 5$237 6$217 7$237 8$237 9$217 10$217 11$237 12$237 13$217 14$237 15$237 16$217 17$217 18$324 19$447 20$479 21$346 22$361 23$351 24$310 25$313 26$415 27$361 28$375 29$407 30$377 31$217 1 2 3 4

Limited Availability

16% of dates checked are available within 10% of the lowest price

Tuesday, December 23rd, 2025

10 round-trip options

Returning

Sun, Dec 28, 2025•5 Day Trip

$581 USD

Google Flights

Returning

Mon, Dec 29, 2025•6 Day Trip

$401 USD

Google Flights

Returning

Tue, Dec 30, 2025•7 Day Trip

$400 USD

Google Flights

Returning

Wed, Dec 31, 2025•8 Day Trip

$391 USD

Google Flights

Returning

Thu, Jan 1, 2026•9 Day Trip

$371 USD

Google Flights

Returning

Fri, Jan 2, 2026•10 Day Trip

$401 USD

Google Flights

Returning

Sat, Jan 3, 2026•11 Day Trip

$540 USD

Google Flights

Returning

Sun, Jan 4, 2026•12 Day Trip

$411 USD

Google Flights

Returning

Mon, Jan 5, 2026•13 Day Trip

$401 USD

Google Flights

Returning

Tue, Jan 6, 2026•14 Day Trip

$351 USD

Google Flights