There are
1,822 mi
from Reno, NV to St Charles, MO
That's the driving distance. It would take 1 day 7 hours to go from Reno, Nevada to St Charles, Missouri.
The flight distance (direct flight from Reno, NV to St Charles, MO) is 1,563.74 mi.
1,822 mi = 1.61 kms