There are
1,076 mi
from Markham, IL to Brenham, TX
That's the driving distance. It would take 19 hours 49 mins to go from Markham, Illinois to Brenham, Texas.
The flight distance (direct flight from Markham, IL to Brenham, TX) is 926.56 mi.
1,076 mi = 1,731.83 kms