Cheap Alaska Airlines flights San Francisco (SFO) to Washington (IAD)

Landing cheap one-way Alaska Airlines flights from SFO to IAD on Expedia couldn’t be easier — just filter by “Price (lowest to highest).” Alternatively, check out our budget-friendly round-trip fares for your next getaway.**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.

Browse for one-way or return flights to Washington in January or February. You could find cheaper fares with Alaska Airlines during these off-season months.

Begin your search one to three months ahead of your travel date to get cheap fares on Alaska Airlines flights from San Francisco Intl. Airport (SFO) to Washington Dulles Intl. Airport (IAD). 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 reduce 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 your timing spot on, and you can enjoy significant savings on domestic flights.*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.

To figure out if there’s a direct trip from SFO to IAD with Alaska Airlines or other carriers, select the “Nonstop” filter when looking for flights.

Sort your results by “Early Morning” and “Morning” to browse the earliest departures from SFO to IAD. Taking off early means you’re 20% less likely to experience cancellations.**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.

Alaska Airlines flights from San Francisco Intl. Airport (SFO) to Washington arrive at Washington Dulles Intl. Airport (IAD). This is the main entry point here.

Taking off from SFO to IAD with Alaska Airlines means enjoying a host of benefits, including an excellent in-flight experience and top-tier customer service. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to spend on select future travel purchases. That’s on top of the Mileage Plan points you can earn with Alaska Airlines.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Changes are usually free within 24 hours of booking, but your airline may add a charge after that. For more information about modifying your flights, head to your “Trips,” select your flight and click on “Manage Booking.” If you want the flexibility to change your plans without additional costs, apply the “No cancel fee” or “Changes included” filter when planning your trip.