The calculated distance (air line) between Bhairab Bāzār and Dharmanagar is approximately 78 miles respectively 126 kilometers.
By car or train, the actual journey to Dharmanagar is certainly longer, as only the direct route (as the crow flies) between Bhairab Bāzār and Dharmanagar has been calculated here.
Air line (approximately)
126 kilometers
68 nautical miles