$143 Cheap United flights Washington (IAD) to San Francisco (SFO)

Scoring cheap one-way United Airlines flights from IAD to SFO from $143 on Expedia couldn’t be simpler — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly return fares from $237 for your next adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Search for return or one-way flights to San Francisco in February or April. You could find cheaper fares with United Airlines during these quieter months.

Begin your search one to three months ahead of your departure date to get cheaper fares on United Airlines flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic trips.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Hop on one of United Airlines’s 39 weekly direct flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO). To see your options, enter your travel dates, origin and destination and hit search. Then select the “Nonstop” and “Airline” filters.

It takes approximately 6h 6m to travel nonstop from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) with United Airlines.

United Airlines has the most flights from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO) on Thursday. With up to 6 daily departures, you’ll get the most choice and flexibility on this day.

The earliest flight from IAD to SFO with United Airlines departs at 6:32AM UTC-5. You’ll land at 9:40AM UTC-8. The last United Airlines flight of the day leaves at 10:05PM UTC-5 and arrives at 1:11AM UTC-8. With 20% fewer cancellations for morning departures, jetting out early is usually the best way to go.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Take a United Airlines flight from Washington Dulles Intl. Airport (IAD) to San Francisco, and you’ll most likely come in to San Francisco Intl. Airport (SFO). This is the airline’s main hub in this city.

With a rewarding loyalty program, United Airlines is a favorite of many travelers journeying from IAD to SFO. Plus, if you’re a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely be onboard a Boeing 737-900 or a Boeing 737 MAX 9 when flying United Airlines from Washington Dulles Intl. Airport (IAD) to San Francisco Intl. Airport (SFO). However, keep in mind that a different plane may be used due to operational factors.

Depending on the ticket type you purchased, a fee will generally apply if you cancel or reschedule your booking more than 24 hours after confirmation. To find tickets with more flexibility, select our “Changes included” or “No cancel fee” filter when searching for flights. For more details on changing or canceling your reservation, visit “Trips,” select your flight and tick “Manage Booking.”