There are
2,165 mi
from Kennewick, WA to Port Arthur, TX
That's the driving distance. It would take 1 day 14 hours to go from Kennewick, Washington to Port Arthur, Texas.
The flight distance (direct flight from Kennewick, WA to Port Arthur, TX) is 1,761.86 mi.
2,165 mi = 3,484.22 kms