There are
1,486 mi
from Twin Falls, ID to Ballwin, MO
That's the driving distance. It would take 1 day 1 hour to go from Twin Falls, Idaho to Ballwin, Missouri.
The flight distance (direct flight from Twin Falls, ID to Ballwin, MO) is 1,279.99 mi.
1,486 mi = 2,391.27 kms