There are
3,051 mi
from Nashua, NH to Seatac, WA
That's the driving distance. It would take 2 days 6 hours to go from Nashua, New Hampshire to Seatac, Washington.
The flight distance (direct flight from Nashua, NH to Seatac, WA) is 2,456.17 mi.
3,051 mi = 4.83 kms