There are
991 mi
from Tallahassee, FL to Gladstone, MO
That's the driving distance. It would take 19 hours 30 mins to go from Tallahassee, Florida to Gladstone, Missouri.
The flight distance (direct flight from Tallahassee, FL to Gladstone, MO) is 839.34 mi.
991 mi = 1,594.23 kms