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