San Francisco (SFO) to Washington (IAD) cheap flight deal from $139 USD in economy class – flightdeals.net

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United Airlines

UAUnited Airlines

One Way•Economy

San Francisco International Airport

San Francisco, United States

Washington Dulles International Airport

Washington, United States

$199 USD

-30%$139 USD

Verified Sep 20, 2025 at 6:07 AM

October 2025

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29$262 30$286 1$286 2$327 3$227 4$222 5$227 6$217 7$217 8$217 9$292 10$227 11$139 12$202 13$159 14$139 15$139 16$179 17$159 18$139 19$198 20$159 21$139 22$139 23$159 24$159 25$139 26$159 27$159 28$139 29$139 30$159 31$159 1 2

Limited Availability

19% of dates checked are available within 10% of the lowest price

Saturday, October 11th, 2025

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