There are
2,912 mi
from New Haven, CT to Seatac, WA
That's the driving distance. It would take 2 days 4 hours to go from New Haven, Connecticut to Seatac, Washington.
The flight distance (direct flight from New Haven, CT to Seatac, WA) is 2,433.68 mi.
2,912 mi = 3.22 kms