There are
1,518 mi
from Harlingen, TX to Waupun, WI
That's the driving distance. It would take 1 day 4 hours to go from Harlingen, Texas to Waupun, Wisconsin.
The flight distance (direct flight from Harlingen, TX to Waupun, WI) is 1,305.92 mi.
1,518 mi = 2,442.62 kms