There are
1,959 mi
from Vacaville, CA to Pasadena, TX
That's the driving distance. It would take 1 day 10 hours to go from Vacaville, California to Pasadena, Texas.
The flight distance (direct flight from Vacaville, CA to Pasadena, TX) is 1,638.85 mi.
1,959 mi = 1.61 kms