There are
2,027 mi
from Pittsburg, CA to St Charles, MO
That's the driving distance. It would take 1 day 10 hours to go from Pittsburg, California to St Charles, Missouri.
The flight distance (direct flight from Pittsburg, CA to St Charles, MO) is 1,691.05 mi.
2,027 mi = 3,261.76 kms