The calculated distance (air line) between Khulna and Pār Naogaon is approximately 143 miles respectively 230 kilometers.
By car or train, the actual journey to Pār Naogaon is certainly longer, as only the direct route (as the crow flies) between Khulna and Pār Naogaon has been calculated here.
Air line (approximately)
230 kilometers
124 nautical miles