| Donostia to Solofra | 878.45 mi (1,413.73 km) |
| Donostia to Somma Lombardo | 550.56 mi (886.03 km) |
| Donostia to Somma Vesuviana | 857.00 mi (1,379.21 km) |
| Donostia to Sommacampagna | 649.11 mi (1,044.65 km) |
| Donostia to Sona | 648.65 mi (1,043.90 km) |
| Donostia to Sondrio | 613.24 mi (986.91 km) |
| Donostia to Sora | 800.76 mi (1,288.70 km) |
| Donostia to Sorbolo | 625.16 mi (1,006.09 km) |
| Donostia to Soresina | 600.26 mi (966.03 km) |
| Donostia to Sorisole | 596.39 mi (959.79 km) |
| Donostia to Sorrento | 858.88 mi (1,382.23 km) |
| Donostia to Sorso | 568.44 mi (914.81 km) |
| Donostia to Sortino | 990.42 mi (1,593.93 km) |
| Donostia to Soverato Marina | 1,015.41 mi (1,634.14 km) |
| Donostia to Sovicille | 663.71 mi (1,068.14 km) |
