| Romeoville to Sestu | 4,809.75 mi (7,740.55 km) |
| Romeoville to Settimo Torinese | 4,515.75 mi (7,267.40 km) |
| Romeoville to Seveso | 4,549.57 mi (7,321.83 km) |
| Romeoville to Sezze | 4,879.52 mi (7,852.82 km) |
| Romeoville to Siano | 4,975.52 mi (8,007.32 km) |
| Romeoville to Siena | 4,732.20 mi (7,615.73 km) |
| Romeoville to Signa | 4,703.46 mi (7,569.49 km) |
| Romeoville to Silea | 4,671.78 mi (7,518.51 km) |
| Romeoville to Silvi Paese | 4,875.58 mi (7,846.48 km) |
| Romeoville to Sinalunga | 4,752.49 mi (7,648.39 km) |
| Romeoville to Siniscola | 4,781.28 mi (7,694.73 km) |
| Romeoville to Sinnai | 4,814.32 mi (7,747.91 km) |
| Romeoville to Siracusa | 5,167.43 mi (8,316.18 km) |
| Romeoville to Solaro | 4,548.62 mi (7,320.29 km) |
| Romeoville to Soliera | 4,656.73 mi (7,494.29 km) |
