The calculated distance (air line) between Spassk-Dal’niy and Vladivostok is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Vladivostok is certainly longer, as only the direct route (as the crow flies) between Spassk-Dal’niy and Vladivostok has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles