There are
2,940 mi
from North Charleston, SC to Seatac, WA
That's the driving distance. It would take 2 days 4 hours to go from North Charleston, South Carolina to Seatac, Washington.
The flight distance (direct flight from North Charleston, SC to Seatac, WA) is 2,415.86 mi.
2,940 mi = 4,731.60 kms