The calculated distance (air line) between Seredyna-Buda and Chernihiv is approximately 127 miles respectively 204 kilometers.
By car or train, the actual journey to Chernihiv is certainly longer, as only the direct route (as the crow flies) between Seredyna-Buda and Chernihiv has been calculated here.
Air line (approximately)
204 kilometers
110 nautical miles