The calculated distance (air line) between Rānīr Bāzār and Khagrachhari is approximately 63 miles respectively 102 kilometers.
By car or train, the actual journey to Khagrachhari is certainly longer, as only the direct route (as the crow flies) between Rānīr Bāzār and Khagrachhari has been calculated here.
Air line (approximately)
102 kilometers
55 nautical miles