There are
1,958 mi
from Pasadena, TX to Vacaville, CA
That's the driving distance. It would take 1 day 10 hours to go from Pasadena, Texas to Vacaville, California.
The flight distance (direct flight from Pasadena, TX to Vacaville, CA) is 1,638.85 mi.
1,958 mi = 1.61 kms