The calculated distance (air line) between Vyazemskiy and Khabarovsk is approximately 67 miles respectively 108 kilometers.
By car or train, the actual journey to Khabarovsk is certainly longer, as only the direct route (as the crow flies) between Vyazemskiy and Khabarovsk has been calculated here.
Air line (approximately)
108 kilometers
58 nautical miles