The calculated distance (air line) between Donostia / San Sebastián and Hondarribia is approximately 10 miles respectively 16 kilometers.
By car or train, the actual journey to Hondarribia is certainly longer, as only the direct route (as the crow flies) between Donostia / San Sebastián and Hondarribia has been calculated here.
Air line (approximately)
16 kilometers
8 nautical miles