| Romeoville to Solofra | 4,980.38 mi (8,015.15 km) |
| Romeoville to Somma Lombardo | 4,530.78 mi (7,291.59 km) |
| Romeoville to Somma Vesuviana | 4,962.09 mi (7,985.71 km) |
| Romeoville to Sommacampagna | 4,626.44 mi (7,445.53 km) |
| Romeoville to Sona | 4,624.42 mi (7,442.28 km) |
| Romeoville to Sondrio | 4,556.91 mi (7,333.65 km) |
| Romeoville to Sora | 4,892.13 mi (7,873.12 km) |
| Romeoville to Sorbolo | 4,633.56 mi (7,457.00 km) |
| Romeoville to Soresina | 4,592.28 mi (7,390.56 km) |
| Romeoville to Sorisole | 4,566.10 mi (7,348.42 km) |
| Romeoville to Sorrento | 4,970.38 mi (7,999.05 km) |
| Romeoville to Sorso | 4,725.27 mi (7,604.59 km) |
| Romeoville to Sortino | 5,152.45 mi (8,292.06 km) |
| Romeoville to Soverato Marina | 5,145.71 mi (8,281.21 km) |
| Romeoville to Sovicille | 4,729.76 mi (7,611.81 km) |
