There are
1,035 mi
from Gainesville, FL to Harker Heights, TX
That's the driving distance. It would take 19 hours 9 mins to go from Gainesville, Florida to Harker Heights, Texas.
The flight distance (direct flight from Gainesville, FL to Harker Heights, TX) is 918.76 mi.
1,035 mi = 1.61 kms