There are
2,071 mi
from Sunnyvale, CA to St Charles, MO
That's the driving distance. It would take 1 day 11 hours to go from Sunnyvale, California to St Charles, Missouri.
The flight distance (direct flight from Sunnyvale, CA to St Charles, MO) is 1,708.85 mi.
2,071 mi = 3.22 kms