There are
1,591 mi
from Las Vegas, NV to Florissant, MO
That's the driving distance. It would take 1 day 3 hours to go from Las Vegas, Nevada to Florissant, Missouri.
The flight distance (direct flight from Las Vegas, NV to Florissant, MO) is 1,372.21 mi.
1,591 mi = 1.61 kms