The calculated distance (air line) between Bithūr and Goshāīnganj is approximately 53 miles respectively 85 kilometers.
By car or train, the actual journey to Goshāīnganj is certainly longer, as only the direct route (as the crow flies) between Bithūr and Goshāīnganj has been calculated here.
Air line (approximately)
85 kilometers
46 nautical miles