The calculated distance (air line) between Daugavpils and Rēzekne is approximately 53 miles respectively 86 kilometers.
By car or train, the actual journey to Rēzekne is certainly longer, as only the direct route (as the crow flies) between Daugavpils and Rēzekne has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles