There are
1,588 mi
from San Clemente, CA to Pittsburg, KS
That's the driving distance. It would take 1 day 3 hours to go from San Clemente, California to Pittsburg, Kansas.
The flight distance (direct flight from San Clemente, CA to Pittsburg, KS) is 1,315.37 mi.
1,588 mi = 2,556.24 kms