| Romeoville to Sesena | 4,219.61 mi (6,790.81 km) |
| Romeoville to Sestao | 4,135.45 mi (6,655.36 km) |
| Romeoville to Sevilla | 4,219.65 mi (6,790.87 km) |
| Romeoville to Sevilla La Nueva | 4,195.93 mi (6,752.69 km) |
| Romeoville to Silla | 4,394.34 mi (7,072.01 km) |
| Romeoville to Silleda | 3,926.34 mi (6,318.83 km) |
| Romeoville to Sitges | 4,419.94 mi (7,113.20 km) |
| Romeoville to Socuellamos | 4,290.10 mi (6,904.25 km) |
| Romeoville to Soller | 4,515.85 mi (7,267.56 km) |
| Romeoville to Solsona | 4,378.60 mi (7,046.68 km) |
| Romeoville to Son Servera | 4,550.40 mi (7,323.16 km) |
| Romeoville to Sonseca | 4,222.98 mi (6,796.23 km) |
| Romeoville to Sopelana | 4,134.11 mi (6,653.21 km) |
| Romeoville to Soria | 4,213.98 mi (6,781.75 km) |
| Romeoville to Suances | 4,085.88 mi (6,575.59 km) |
