The calculated distance (air line) between Varakļāni and Daugavpils is approximately 51 miles respectively 82 kilometers.
By car or train, the actual journey to Daugavpils is certainly longer, as only the direct route (as the crow flies) between Varakļāni and Daugavpils has been calculated here.
Air line (approximately)
82 kilometers
44 nautical miles