There are
2,091 mi
from Ukiah, CA to Harlingen, TX
That's the driving distance. It would take 1 day 12 hours to go from Ukiah, California to Harlingen, Texas.
The flight distance (direct flight from Ukiah, CA to Harlingen, TX) is 1,723.86 mi.
2,091 mi = 3,364.44 kms