To save up to 20% on this flight, we recommend booking at least 44 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Imperial to San Francisco from $117 1-2 weeks out and tickets from $137 for flights departing within the next 72 hours.
February can be a great time to fly to San Francisco from Imperial with a flight ticket averaging about $121. Cheapflights users have found deals in the month of February for as cheap as $61. The most expensive prices can be found in the month of April.