There are
1,425 mi
from Billings, MT to Harker Heights, TX
That's the driving distance. It would take 1 day 1 hour to go from Billings, Montana to Harker Heights, Texas.
The flight distance (direct flight from Billings, MT to Harker Heights, TX) is 1,170.46 mi.
1,425 mi = 1.61 kms