SFO to IAD from $357 in economy

UAUnited Airlines

Round Trip•Economy

SFO

San Francisco International Airport

San Francisco, United States

IAD

Washington Dulles International Airport

Washington, United States

$448 USD

-20%$357 USD

Verified 13 days ago

September 2026

Today

Mon

Tue

Wed

Thu

Fri

Sat

Sun

31$381 1$357 2$357 3$392 4$392 5$357 6$392 7$392 8$357 9$357 10$392 11$392 12$357 13$392 14$392 15$357 16$357 17$392 18$392 19$357 20$392 21$392 22$357 23$357 24$392 25$392 26$357 27$392 28$392 29$357 30$357 1$392 2$392 3$357 4$392

Fair Availability

25% of dates checked are available within 10% of the lowest price

Tuesday, September 29th, 2026

6 round-trip options

Returning

Sun, Oct 4, 2026•5 Day Trip

$392 USD

Google Flights

Returning

Mon, Oct 5, 2026•6 Day Trip

$375 USD

Google Flights

Returning

Tue, Oct 6, 2026•7 Day Trip

$357 USD

Google Flights

Returning

Sat, Oct 10, 2026•11 Day Trip

$357 USD

Google Flights

Returning

Sun, Oct 11, 2026•12 Day Trip

$392 USD

Google Flights

Returning

Mon, Oct 12, 2026•13 Day Trip

$392 USD

Google Flights

San Francisco (SFO) to Washington (IAD) flight deal in economy from $357

San Francisco International Airport

Washington Dulles International Airport

September 2026

Tuesday, September 29th, 2026