There are
999 mi
from Davenport, IA to Huntsville, TX
That's the driving distance. It would take 18 hours 37 mins to go from Davenport, Iowa to Huntsville, Texas.
The flight distance (direct flight from Davenport, IA to Huntsville, TX) is 795.78 mi.
999 mi = 1,608.41 kms