There are
1,696 mi
from Boise, ID to Champaign, IL
That's the driving distance. It would take 1 day 5 hours to go from Boise, Idaho to Champaign, Illinois.
The flight distance (direct flight from Boise, ID to Champaign, IL) is 1,453.47 mi.
1,696 mi = 1.61 kms