There are
1,835 mi
from Chattanooga, TN to Idaho Falls, ID
That's the driving distance. It would take 1 day 9 hours to go from Chattanooga, Tennessee to Idaho Falls, Idaho.
The flight distance (direct flight from Chattanooga, TN to Idaho Falls, ID) is 1,535.55 mi.
1,835 mi = 1.61 kms