The calculated distance (air line) between Aizkraukle and Jēkabpils is approximately 24 miles respectively 39 kilometers.
By car or train, the actual journey to Jēkabpils is certainly longer, as only the direct route (as the crow flies) between Aizkraukle and Jēkabpils has been calculated here.
Air line (approximately)
39 kilometers
21 nautical miles