The calculated distance (air line) between Daugavgrīva and Rēzekne is approximately 130 miles respectively 210 kilometers.
By car or train, the actual journey to Rēzekne is certainly longer, as only the direct route (as the crow flies) between Daugavgrīva and Rēzekne has been calculated here.
Air line (approximately)
210 kilometers
113 nautical miles