There are
2,532 mi
from Chattanooga, TN to Seatac, WA
That's the driving distance. It would take 1 day 20 hours to go from Chattanooga, Tennessee to Seatac, Washington.
The flight distance (direct flight from Chattanooga, TN to Seatac, WA) is 2,080.14 mi.
2,532 mi = 3.22 kms