| Castricum to Selargius | 943.28 mi (1,518.06 km) |
| Castricum to Selvazzano Dentro | 590.46 mi (950.26 km) |
| Castricum to Senago | 521.84 mi (839.83 km) |
| Castricum to Senigallia | 725.73 mi (1,167.95 km) |
| Castricum to Seravezza | 643.35 mi (1,035.37 km) |
| Castricum to Seregno | 518.72 mi (834.81 km) |
| Castricum to Seriate | 526.16 mi (846.78 km) |
| Castricum to Sermoneta | 853.63 mi (1,373.78 km) |
| Castricum to Serramanna | 929.30 mi (1,495.56 km) |
| Castricum to Serravalle Pistoiese | 661.05 mi (1,063.86 km) |
| Castricum to Sessa Aurunca | 894.34 mi (1,439.30 km) |
| Castricum to Sesto Calende | 503.76 mi (810.73 km) |
| Castricum to Sesto Fiorentino | 672.60 mi (1,082.45 km) |
| Castricum to Sesto San Giovanni | 526.82 mi (847.83 km) |
| Castricum to Sestri Levante | 611.24 mi (983.69 km) |
