There are
2,557 mi
from Downey, CA to Knightdale, NC
That's the driving distance. It would take 1 day 20 hours to go from Downey, California to Knightdale, North Carolina.
The flight distance (direct flight from Downey, CA to Knightdale, NC) is 2,236.26 mi.
2,557 mi = 4,115.77 kms