To save up to 7% on this flight, we recommend booking at least 35 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from West Yellowstone to San Francisco from $99 1-2 weeks out and tickets from $105 for flights departing within the next 72 hours.
The best pricing can be found in the month of August. Prices to San Francisco from West Yellowstone average $108. You can even find prices in August for less than $108, as users have found deals to San Francisco from as low as $48. The month of June appears to be one of the more expensive times to travel to San Francisco from West Yellowstone. Flying in the targeted month can save you up to 17%.