There are
964 mi
from Cheyenne, WY to Prospect Heights, IL
That's the driving distance. It would take 17 hours 1 min to go from Cheyenne, Wyoming to Prospect Heights, Illinois.
The flight distance (direct flight from Cheyenne, WY to Prospect Heights, IL) is 873.11 mi.
964 mi = 1,551.73 kms