| Castricum to Solofra | 940.42 mi (1,513.46 km) |
| Castricum to Somma Lombardo | 508.09 mi (817.70 km) |
| Castricum to Somma Vesuviana | 928.28 mi (1,493.92 km) |
| Castricum to Sommacampagna | 567.57 mi (913.42 km) |
| Castricum to Sona | 565.16 mi (909.53 km) |
| Castricum to Sondrio | 498.85 mi (802.83 km) |
| Castricum to Sora | 857.13 mi (1,379.42 km) |
| Castricum to Sorbolo | 593.54 mi (955.22 km) |
| Castricum to Soresina | 554.08 mi (891.71 km) |
| Castricum to Sorisole | 521.63 mi (839.49 km) |
| Castricum to Sorrento | 942.01 mi (1,516.02 km) |
| Castricum to Sorso | 832.54 mi (1,339.84 km) |
| Castricum to Sortino | 1,175.15 mi (1,891.22 km) |
| Castricum to Soverato Marina | 1,113.77 mi (1,792.44 km) |
| Castricum to Sovicille | 708.10 mi (1,139.58 km) |
