There are
1,656 mi
from Pittsburg, CA to Fredericksburg, TX
That's the driving distance. It would take 1 day 4 hours to go from Pittsburg, California to Fredericksburg, Texas.
The flight distance (direct flight from Pittsburg, CA to Fredericksburg, TX) is 1,415.87 mi.
1,656 mi = 2,665.00 kms