There are
1,565 mi
from Boise, ID to Southlake, TX
That's the driving distance. It would take 1 day 3 hours to go from Boise, Idaho to Southlake, Texas.
The flight distance (direct flight from Boise, ID to Southlake, TX) is 1,266.75 mi.
1,565 mi = 1.61 kms