There are
2,023 mi
from Pittsburg, CA to St Peters, MO
That's the driving distance. It would take 1 day 10 hours to go from Pittsburg, California to St Peters, Missouri.
The flight distance (direct flight from Pittsburg, CA to St Peters, MO) is 1,686.16 mi.
2,023 mi = 3,255.68 kms