There are
1,075 mi
from Schaumburg, IL to Harker Heights, TX
That's the driving distance. It would take 19 hours 54 mins to go from Schaumburg, Illinois to Harker Heights, Texas.
The flight distance (direct flight from Schaumburg, IL to Harker Heights, TX) is 923.22 mi.
1,075 mi = 1.61 kms