There are
2,159 mi
from Gallatin, TN to Pendleton, OR
That's the driving distance. It would take 1 day 13 hours to go from Gallatin, Tennessee to Pendleton, Oregon.
The flight distance (direct flight from Gallatin, TN to Pendleton, OR) is 1,788.80 mi.
2,159 mi = 3,474.29 kms