Washington (IAD) to San Diego (SAN) flight deal from $237 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

$354 USD

-33%$237 USD

Verified Nov 30, 2025 at 10:22 PM

December 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$1,150 2$604 3$604 4$604 5$604 6$554 7$462 8$462 9$462 10$432 11$432 12$432 13$364 14$347 15$315 16$345 17$347 18$347 19$402 20$419 21$384 22$417 23$357 24$349 25$365 26$532 27$776 28$532 29$483 30$377 31$282 1$287 2$325 3$325 4$335

Limited Availability

14% of dates checked are available within 10% of the lowest price

Sunday, December 21st, 2025

10 round-trip options

Returning

Fri, Dec 26, 2025•5 Day Trip

$384 USD

Google Flights

Returning

Sat, Dec 27, 2025•6 Day Trip

$555 USD

Google Flights

Returning

Sun, Dec 28, 2025•7 Day Trip

$471 USD

Google Flights

Returning

Mon, Dec 29, 2025•8 Day Trip

$390 USD

Google Flights

Returning

Tue, Dec 30, 2025•9 Day Trip

$484 USD

Google Flights

Returning

Wed, Dec 31, 2025•10 Day Trip

$395 USD

Google Flights

Returning

Thu, Jan 1, 2026•11 Day Trip

$458 USD

Google Flights

Returning

Fri, Jan 2, 2026•12 Day Trip

$658 USD

Google Flights

Returning

Sat, Jan 3, 2026•13 Day Trip

$632 USD

Google Flights

Returning

Sun, Jan 4, 2026•14 Day Trip

$497 USD

Google Flights