There are
859 mi
from Garland, TX to Bettendorf, IA
That's the driving distance. It would take 15 hours 57 mins to go from Garland, Texas to Bettendorf, Iowa.
The flight distance (direct flight from Garland, TX to Bettendorf, IA) is 686.73 mi.
859 mi = 1,382.74 kms