The calculated distance (air line) between Krasnyy Yar and Ulyanovsk is approximately 100 miles respectively 160 kilometers.
By car or train, the actual journey to Ulyanovsk is certainly longer, as only the direct route (as the crow flies) between Krasnyy Yar and Ulyanovsk has been calculated here.
Air line (approximately)
160 kilometers
87 nautical miles