There are
2,366 mi
from Springfield, OH to Seatac, WA
That's the driving distance. It would take 1 day 17 hours to go from Springfield, Ohio to Seatac, Washington.
The flight distance (direct flight from Springfield, OH to Seatac, WA) is 1,971.19 mi.
2,366 mi = 3,807.54 kms