There are
971 mi
from Cheyenne, WY to Deerfield, IL
That's the driving distance. It would take 17 hours 9 mins to go from Cheyenne, Wyoming to Deerfield, Illinois.
The flight distance (direct flight from Cheyenne, WY to Deerfield, IL) is 877.77 mi.
971 mi = 1,562.22 kms