| San Marino to Sestu | 6,345.36 mi (10,211.87 km) |
| San Marino to Settimo Torinese | 5,999.36 mi (9,655.04 km) |
| San Marino to Seveso | 6,017.35 mi (9,683.99 km) |
| San Marino to Sezze | 6,363.04 mi (10,240.32 km) |
| San Marino to Siano | 6,453.16 mi (10,385.36 km) |
| San Marino to Siena | 6,209.73 mi (9,993.60 km) |
| San Marino to Signa | 6,177.63 mi (9,941.94 km) |
| San Marino to Silea | 6,115.22 mi (9,841.50 km) |
| San Marino to Silvi Paese | 6,339.35 mi (10,202.21 km) |
| San Marino to Sinalunga | 6,228.03 mi (10,023.04 km) |
| San Marino to Siniscola | 6,299.98 mi (10,138.85 km) |
| San Marino to Sinnai | 6,349.12 mi (10,217.91 km) |
| San Marino to Siracusa | 6,677.53 mi (10,746.44 km) |
| San Marino to Solaro | 6,017.12 mi (9,683.61 km) |
| San Marino to Soliera | 6,121.49 mi (9,851.59 km) |
