There are
1,093 mi
from Killeen, TX to Deerfield, IL
That's the driving distance. It would take 20 hours 17 mins to go from Killeen, Texas to Deerfield, Illinois.
The flight distance (direct flight from Killeen, TX to Deerfield, IL) is 938.50 mi.
1,093 mi = 1.61 kms