There are
1,817 mi
from Westminster, CA to Wentzville, MO
That's the driving distance. It would take 1 day 7 hours to go from Westminster, California to Wentzville, Missouri.
The flight distance (direct flight from Westminster, CA to Wentzville, MO) is 1,545.45 mi.
1,817 mi = 2,923.56 kms