The calculated distance (air line) between Shāhzādpur and Gafargaon is approximately 63 miles respectively 101 kilometers.
By car or train, the actual journey to Gafargaon is certainly longer, as only the direct route (as the crow flies) between Shāhzādpur and Gafargaon has been calculated here.
Air line (approximately)
101 kilometers
55 nautical miles