There are
2,489 mi
from Vacaville, CA to Alpena, MI
That's the driving distance. It would take 1 day 19 hours to go from Vacaville, California to Alpena, Michigan.
The flight distance (direct flight from Vacaville, CA to Alpena, MI) is 2,021.62 mi.
2,489 mi = 3.22 kms