There are
842 mi
from Champaign, IL to Seagoville, TX
That's the driving distance. It would take 14 hours 46 mins to go from Champaign, Illinois to Seagoville, Texas.
The flight distance (direct flight from Champaign, IL to Seagoville, TX) is 692 mi.
842 mi = 1,355.06 kms