| Romeoville to Benavente | 4,027.15 mi (6,481.08 km) |
| Romeoville to Bombarral | 4,000.22 mi (6,437.74 km) |
| Romeoville to Bougado | 3,957.04 mi (6,368.24 km) |
| Romeoville to Braga | 3,956.17 mi (6,366.84 km) |
| Romeoville to Braganca | 4,022.22 mi (6,473.14 km) |
| Romeoville to Cabeceiras de Basto | 3,974.96 mi (6,397.08 km) |
| Romeoville to Cacem | 4,010.38 mi (6,454.08 km) |
| Romeoville to Cadaval | 4,003.99 mi (6,443.80 km) |
| Romeoville to Caldas da Rainha | 3,996.32 mi (6,431.46 km) |
| Romeoville to Calheta | 3,843.57 mi (6,185.62 km) |
| Romeoville to Camara de Lobos | 3,853.99 mi (6,202.40 km) |
| Romeoville to Canico | 3,862.28 mi (6,215.74 km) |
| Romeoville to Cantanhede | 3,989.02 mi (6,419.71 km) |
| Romeoville to Carregal do Sal | 4,013.18 mi (6,458.59 km) |
| Romeoville to Cartaxo | 4,021.54 mi (6,472.05 km) |
