| Knokke-Heist to Settimo Torinese | 475.69 mi (765.55 km) |
| Knokke-Heist to Seveso | 475.86 mi (765.82 km) |
| Knokke-Heist to Sezze | 822.66 mi (1,323.94 km) |
| Knokke-Heist to Siano | 908.37 mi (1,461.88 km) |
| Knokke-Heist to Siena | 669.36 mi (1,077.22 km) |
| Knokke-Heist to Signa | 635.93 mi (1,023.43 km) |
| Knokke-Heist to Silea | 568.92 mi (915.59 km) |
| Knokke-Heist to Silvi Paese | 791.98 mi (1,274.57 km) |
| Knokke-Heist to Sinalunga | 685.96 mi (1,103.95 km) |
| Knokke-Heist to Siniscola | 804.36 mi (1,294.49 km) |
| Knokke-Heist to Sinnai | 879.33 mi (1,415.15 km) |
| Knokke-Heist to Siracusa | 1,148.06 mi (1,847.62 km) |
| Knokke-Heist to Solaro | 476.16 mi (766.30 km) |
| Knokke-Heist to Soliera | 576.11 mi (927.15 km) |
| Knokke-Heist to Solofra | 911.03 mi (1,466.16 km) |
