There are
1,450 mi
from St Charles, MO to Tempe, AZ
That's the driving distance. It would take 1 day 1 hour to go from St Charles, Missouri to Tempe, Arizona.
The flight distance (direct flight from St Charles, MO to Tempe, AZ) is 1,248.82 mi.
1,450 mi = 2,333.93 kms