There are
2,090 mi
from Kennewick, WA to Plainfield, IN
That's the driving distance. It would take 1 day 12 hours to go from Kennewick, Washington to Plainfield, Indiana.
The flight distance (direct flight from Kennewick, WA to Plainfield, IN) is 1,702.03 mi.
2,090 mi = 3,363.47 kms