There are
1,133 mi
from Mcallen, TX to Cahokia, IL
That's the driving distance. It would take 20 hours 56 mins to go from Mcallen, Texas to Cahokia, Illinois.
The flight distance (direct flight from Mcallen, TX to Cahokia, IL) is 973.78 mi.
1,133 mi = 1.61 kms