| Round Rock to Sestu | 5,704.12 mi (9,179.89 km) |
| Round Rock to Settimo Torinese | 5,428.07 mi (8,735.63 km) |
| Round Rock to Seveso | 5,465.24 mi (8,795.45 km) |
| Round Rock to Sezze | 5,789.19 mi (9,316.80 km) |
| Round Rock to Siano | 5,885.95 mi (9,472.52 km) |
| Round Rock to Siena | 5,644.41 mi (9,083.80 km) |
| Round Rock to Signa | 5,616.66 mi (9,039.14 km) |
| Round Rock to Silea | 5,591.45 mi (8,998.57 km) |
| Round Rock to Silvi Paese | 5,789.92 mi (9,317.97 km) |
| Round Rock to Sinalunga | 5,665.02 mi (9,116.97 km) |
| Round Rock to Siniscola | 5,681.70 mi (9,143.81 km) |
| Round Rock to Sinnai | 5,708.94 mi (9,187.66 km) |
| Round Rock to Siracusa | 6,067.30 mi (9,764.38 km) |
| Round Rock to Solaro | 5,464.13 mi (8,793.67 km) |
| Round Rock to Soliera | 5,572.33 mi (8,967.79 km) |
