The calculated distance (air line) between Reykjanesbær and Sauðárkrókur is approximately 148 miles respectively 238 kilometers.
By car or train, the actual journey to Sauðárkrókur is certainly longer, as only the direct route (as the crow flies) between Reykjanesbær and Sauðárkrókur has been calculated here.
Air line (approximately)
238 kilometers
129 nautical miles