There are
608 mi
from Garland, TX to Alamogordo, NM
That's the driving distance. It would take 11 hours 51 mins to go from Garland, Texas to Alamogordo, New Mexico.
The flight distance (direct flight from Garland, TX to Alamogordo, NM) is 540.52 mi.
608 mi = 978.17 kms