There are
901 mi
from Gainesville, FL to Hazelwood, MO
That's the driving distance. It would take 16 hours 43 mins to go from Gainesville, Florida to Hazelwood, Missouri.
The flight distance (direct flight from Gainesville, FL to Hazelwood, MO) is 779.25 mi.
901 mi = 1,449.37 kms