The calculated distance (air line) between Ādaži and Daugavgrīva is approximately 11 miles respectively 18 kilometers.
By car or train, the actual journey to Daugavgrīva is certainly longer, as only the direct route (as the crow flies) between Ādaži and Daugavgrīva has been calculated here.
Air line (approximately)
18 kilometers
10 nautical miles