The calculated distance (air line) between Dārzciems and Daugavgrīva is approximately 95 miles respectively 153 kilometers.
By car or train, the actual journey to Daugavgrīva is certainly longer, as only the direct route (as the crow flies) between Dārzciems and Daugavgrīva has been calculated here.
Air line (approximately)
153 kilometers
82 nautical miles