The calculated distance (air line) between Birzai and Dainava (Kaunas) is approximately 94 miles respectively 151 kilometers.
By car or train, the actual journey to Dainava (Kaunas) is certainly longer, as only the direct route (as the crow flies) between Birzai and Dainava (Kaunas) has been calculated here.
Air line (approximately)
151 kilometers
82 nautical miles