There are
2,924 mi
from Waterbury, CT to Vacaville, CA
That's the driving distance. It would take 2 days 3 hours to go from Waterbury, Connecticut to Vacaville, California.
The flight distance (direct flight from Waterbury, CT to Vacaville, CA) is 2,566.45 mi.
2,924 mi = 3.22 kms