There are
2,075 mi
from Mckinney, TX to Seatac, WA
That's the driving distance. It would take 1 day 12 hours to go from Mckinney, Texas to Seatac, Washington.
The flight distance (direct flight from Mckinney, TX to Seatac, WA) is 1,660.57 mi.
2,075 mi = 3.22 kms