There are
1,021 mi
from Hereford, TX to Lemon Grove, CA
That's the driving distance. It would take 18 hours 40 mins to go from Hereford, Texas to Lemon Grove, California.
The flight distance (direct flight from Hereford, TX to Lemon Grove, CA) is 851.68 mi.
1,021 mi = 1,643.72 kms