There are
1,540 mi
from Harlingen, TX to Moreno Valley, CA
That's the driving distance. It would take 1 day 2 hours to go from Harlingen, Texas to Moreno Valley, California.
The flight distance (direct flight from Harlingen, TX to Moreno Valley, CA) is 1,282.07 mi.
1,540 mi = 2,478.03 kms