The calculated distance (air line) between Omsk and Bol’sherech’ye is approximately 91 miles respectively 146 kilometers.
By car or train, the actual journey to Bol’sherech’ye is certainly longer, as only the direct route (as the crow flies) between Omsk and Bol’sherech’ye has been calculated here.
Air line (approximately)
146 kilometers
79 nautical miles