There are
638 mi
from Fayetteville, AR to Rockford, IL
That's the driving distance. It would take 12 hours 2 mins to go from Fayetteville, Arkansas to Rockford, Illinois.
The flight distance (direct flight from Fayetteville, AR to Rockford, IL) is 507.30 mi.
638 mi = 1,026.60 kms