The calculated distance (air line) between Borgarnes and Sauðárkrókur is approximately 107 miles respectively 171 kilometers.
By car or train, the actual journey to Sauðárkrókur is certainly longer, as only the direct route (as the crow flies) between Borgarnes and Sauðárkrókur has been calculated here.
Air line (approximately)
171 kilometers
93 nautical miles