The calculated distance (air line) between Irkutsk and Ust’-Ordynskiy is approximately 40 miles respectively 64 kilometers.
By car or train, the actual journey to Ust’-Ordynskiy is certainly longer, as only the direct route (as the crow flies) between Irkutsk and Ust’-Ordynskiy has been calculated here.
Air line (approximately)
64 kilometers
35 nautical miles