There are
1,407 mi
from Mcallen, TX to Dekalb, IL
That's the driving distance. It would take 1 day 1 hour to go from Mcallen, Texas to Dekalb, Illinois.
The flight distance (direct flight from Mcallen, TX to Dekalb, IL) is 1,212.60 mi.
1,407 mi = 1.61 kms