There are
1,811 mi
from St Charles, MO to Temecula, CA
That's the driving distance. It would take 1 day 7 hours to go from St Charles, Missouri to Temecula, California.
The flight distance (direct flight from St Charles, MO to Temecula, CA) is 1,524.68 mi.
1,811 mi = 2,914.64 kms