There are
1,682 mi
from Vallejo, CA to Fredericksburg, TX
That's the driving distance. It would take 1 day 5 hours to go from Vallejo, California to Fredericksburg, Texas.
The flight distance (direct flight from Vallejo, CA to Fredericksburg, TX) is 1,436.78 mi.
1,682 mi = 1.61 kms