There are
1,424 mi
from Tucson, AZ to St Charles, MO
That's the driving distance. It would take 1 day 1 hour to go from Tucson, Arizona to St Charles, Missouri.
The flight distance (direct flight from Tucson, AZ to St Charles, MO) is 1,231.22 mi.
1,424 mi = 1.61 kms