The calculated distance (air line) between Vagharshapat and Nerkin Getashen is approximately 52 miles respectively 83 kilometers.
By car or train, the actual journey to Nerkin Getashen is certainly longer, as only the direct route (as the crow flies) between Vagharshapat and Nerkin Getashen has been calculated here.
Air line (approximately)
83 kilometers
45 nautical miles