There are
2,759 mi
from Kennewick, WA to Derby, CT
That's the driving distance. It would take 2 days 1 hour to go from Kennewick, Washington to Derby, Connecticut.
The flight distance (direct flight from Kennewick, WA to Derby, CT) is 2,289.61 mi.
2,759 mi = 4,440.51 kms