| Romeoville to Cocentaina | 4,416.59 mi (7,107.82 km) |
| Romeoville to Coin | 4,298.67 mi (6,918.04 km) |
| Romeoville to Colindres | 4,113.26 mi (6,619.66 km) |
| Romeoville to Collado-Villalba | 4,186.53 mi (6,737.56 km) |
| Romeoville to Colmenar Viejo | 4,196.45 mi (6,753.53 km) |
| Romeoville to Colmenarejo | 4,188.75 mi (6,741.15 km) |
| Romeoville to Conil de la Frontera | 4,251.36 mi (6,841.91 km) |
| Romeoville to Consuegra | 4,247.22 mi (6,835.24 km) |
| Romeoville to Corbera de Llobregat | 4,418.41 mi (7,110.74 km) |
| Romeoville to Cordoba | 4,251.88 mi (6,842.74 km) |
| Romeoville to Coria del Rio | 4,215.26 mi (6,783.81 km) |
| Romeoville to Crevillente | 4,419.11 mi (7,111.86 km) |
| Romeoville to Cuarte de Huerva | 4,288.57 mi (6,901.78 km) |
| Romeoville to Cubellas | 4,415.21 mi (7,105.59 km) |
| Romeoville to Cuellar | 4,145.46 mi (6,671.48 km) |
