There are
880 mi
from Fort Walton Beach, FL to Dyer, IN
That's the driving distance. It would take 16 hours 42 mins to go from Fort Walton Beach, Florida to Dyer, Indiana.
The flight distance (direct flight from Fort Walton Beach, FL to Dyer, IN) is 766.80 mi.
880 mi = 1,416.91 kms