The calculated distance (air line) between Bhairab Bāzār and Mirzāpur is approximately 56 miles respectively 89 kilometers.
By car or train, the actual journey to Mirzāpur is certainly longer, as only the direct route (as the crow flies) between Bhairab Bāzār and Mirzāpur has been calculated here.
Air line (approximately)
89 kilometers
48 nautical miles