The calculated distance (air line) between Pār Naogaon and Chilmāri is approximately 69 miles respectively 111 kilometers.
By car or train, the actual journey to Chilmāri is certainly longer, as only the direct route (as the crow flies) between Pār Naogaon and Chilmāri has been calculated here.
Air line (approximately)
111 kilometers
60 nautical miles