There are
1,665 mi
from Harlingen, TX to Oxnard, CA
That's the driving distance. It would take 1 day 4 hours to go from Harlingen, Texas to Oxnard, California.
The flight distance (direct flight from Harlingen, TX to Oxnard, CA) is 1,393.32 mi.
1,665 mi = 2,679.41 kms