There are
1,094 mi
from Kennewick, WA to Arvada, CO
That's the driving distance. It would take 18 hours 38 mins to go from Kennewick, Washington to Arvada, Colorado.
The flight distance (direct flight from Kennewick, WA to Arvada, CO) is 834.82 mi.
1,094 mi = 1,760.86 kms