There are
2,577 mi
from San Clemente, CA to Knightdale, NC
That's the driving distance. It would take 1 day 21 hours to go from San Clemente, California to Knightdale, North Carolina.
The flight distance (direct flight from San Clemente, CA to Knightdale, NC) is 2,216.58 mi.
2,577 mi = 4,146.71 kms