There are
826 mi
from Gaithersburg, MD to Bettendorf, IA
That's the driving distance. It would take 15 hours 21 mins to go from Gaithersburg, Maryland to Bettendorf, Iowa.
The flight distance (direct flight from Gaithersburg, MD to Bettendorf, IA) is 717.90 mi.
826 mi = 1,329.88 kms