The calculated distance (air line) between Bhairab Bāzār and Khowai is approximately 39 miles respectively 63 kilometers.
By car or train, the actual journey to Khowai is certainly longer, as only the direct route (as the crow flies) between Bhairab Bāzār and Khowai has been calculated here.
Air line (approximately)
63 kilometers
34 nautical miles