There are
1,994 mi
from Seattle, WA to Sycamore, IL
That's the driving distance. It would take 1 day 10 hours to go from Seattle, Washington to Sycamore, Illinois.
The flight distance (direct flight from Seattle, WA to Sycamore, IL) is 1,680.44 mi.
1,994 mi = 1.61 kms