The calculated distance (air line) between Vokhtoga and Gavrilov-Yam is approximately 113 miles respectively 182 kilometers.
By car or train, the actual journey to Gavrilov-Yam is certainly longer, as only the direct route (as the crow flies) between Vokhtoga and Gavrilov-Yam has been calculated here.
Air line (approximately)
182 kilometers
98 nautical miles