The calculated distance (air line) between Gardez and Mīr Bachah Kōṯ is approximately 80 miles respectively 129 kilometers.
By car or train, the actual journey to Mīr Bachah Kōṯ is certainly longer, as only the direct route (as the crow flies) between Gardez and Mīr Bachah Kōṯ has been calculated here.
Air line (approximately)
129 kilometers
69 nautical miles