There are
2,078 mi
from Killeen, TX to Seatac, WA
That's the driving distance. It would take 1 day 14 hours to go from Killeen, Texas to Seatac, Washington.
The flight distance (direct flight from Killeen, TX to Seatac, WA) is 1,719.82 mi.
2,078 mi = 3.22 kms