The calculated distance (air line) between Chhāgalnāiya and Sirajganj is approximately 151 miles respectively 243 kilometers.
By car or train, the actual journey to Sirajganj is certainly longer, as only the direct route (as the crow flies) between Chhāgalnāiya and Sirajganj has been calculated here.
Air line (approximately)
243 kilometers
131 nautical miles