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

UAUnited Airlines

Round Trip•Economy

SAN

San Diego International Airport

San Diego, United States

IAD

Washington Dulles International Airport

Washington, United States

$335 USD

-35%$217 USD

Verified Nov 2, 2025 at 12:11 PM

December 2025

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

1$294 2$217 3$217 4$237 5$237 6$217 7$237 8$237 9$217 10$217 11$237 12$237 13$310 14$330 15$330 16$310 17$217 18$247 19$277 20$277 21$247 22$247 23$217 24$217 25$237 26$277 27$277 28$422 29$267 30$266 31$257 1 2 3 4

Limited Availability

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

Friday, December 19th, 2025

10 round-trip options

Returning

Wed, Dec 24, 2025•5 Day Trip

$369 USD

Google Flights

Returning

Thu, Dec 25, 2025•6 Day Trip

$373 USD

Google Flights

Returning

Fri, Dec 26, 2025•7 Day Trip

$471 USD

Google Flights

Returning

Sat, Dec 27, 2025•8 Day Trip

$421 USD

Google Flights

Returning

Sun, Dec 28, 2025•9 Day Trip

$516 USD

Google Flights

Returning

Mon, Dec 29, 2025•10 Day Trip

$466 USD

Google Flights

Returning

Tue, Dec 30, 2025•11 Day Trip

$406 USD

Google Flights

Returning

Wed, Dec 31, 2025•12 Day Trip

$277 USD

Google Flights

Returning

Thu, Jan 1, 2026•13 Day Trip

$307 USD

Google Flights

Returning

Fri, Jan 2, 2026•14 Day Trip

$386 USD

Google Flights