$125 Cheap United flights Calgary (YYC) to San Francisco (SFO)

Finding cheap one-way United Airlines flights from YYC to SFO from $125 on Expedia couldn't be simpler --- just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $191 for your next exciting 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 United Airlines flights from YYC to SFO about one month before you want to go. The most affordable time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. No matter your fare class and itinerary, the best day to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**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 YYC to SFO with United Airlines departs at 3:30PM UTC-7. You'll touch down at 5:33PM UTC-8. The last United Airlines flight of the day leaves at 3:30PM UTC-7 and arrives at 5:33PM UTC-8. With 20% fewer cancellations for departures before midday, jetting out early is usually the smartest choice.**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.

Journey from YYC to SFO with United Airlines and you'll enjoy a host of benefits including a rewarding loyalty program. When booking through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.