Scoring cheap one-way United Airlines flights from SFO to GEG from $59 on Expedia is a breeze — just filter by "Price (lowest to highest)." Or check out our budget-friendly return fares from $111 for your next exciting vacation.**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.

Look for affordable United Airlines flights from San Francisco Intl. Airport (SFO) to Spokane Intl. Airport (GEG) one to three months ahead of your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare class and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**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.

The earliest flight from SFO to GEG with United Airlines departs at 1:11PM UTC-8. You'll touch down at 3:33PM UTC-8. The final United Airlines flight of the day takes off at 9:08PM UTC-8 and arrives at 11:30PM UTC-8. With approximately 20% fewer cancellations for departures before noon, beginning your travel day early is typically the wisest option.**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.

Offering a rewarding loyalty program, United Airlines is a popular choice for many passengers departing from SFO to GEG. Plus, as 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.