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