There are
1,962 mi
from Rockford, IL to Sammamish, WA
That's the driving distance. It would take 1 day 10 hours to go from Rockford, Illinois to Sammamish, Washington.
The flight distance (direct flight from Rockford, IL to Sammamish, WA) is 1,641.64 mi.
1,962 mi = 1.61 kms