There are
2,052 mi
from Harlingen, TX to Oroville, CA
That's the driving distance. It would take 1 day 12 hours to go from Harlingen, Texas to Oroville, California.
The flight distance (direct flight from Harlingen, TX to Oroville, CA) is 1,654.56 mi.
2,052 mi = 3,302.09 kms