There are
2,614 mi
from Rock Hill, SC to Kennewick, WA
That's the driving distance. It would take 1 day 22 hours to go from Rock Hill, South Carolina to Kennewick, Washington.
The flight distance (direct flight from Rock Hill, SC to Kennewick, WA) is 2,122.34 mi.
2,614 mi = 3.22 kms