There are
2,252 mi
from Harlingen, TX to Arcata, CA
That's the driving distance. It would take 1 day 16 hours to go from Harlingen, Texas to Arcata, California.
The flight distance (direct flight from Harlingen, TX to Arcata, CA) is 1,815.48 mi.
2,252 mi = 3,624.59 kms