The calculated distance (air line) between Lenart v Slov. Goricah and Slovenska Bistrica is approximately 18 miles respectively 28 kilometers.
By car or train, the actual journey to Slovenska Bistrica is certainly longer, as only the direct route (as the crow flies) between Lenart v Slov. Goricah and Slovenska Bistrica has been calculated here.
Air line (approximately)
28 kilometers
15 nautical miles