| Ironton to Cascais | 3,839.86 mi (6,179.66 km) |
| Ironton to Castelo Branco | 3,900.59 mi (6,277.39 km) |
| Ironton to Castro Daire | 3,848.86 mi (6,194.13 km) |
| Ironton to Celorico de Basto | 3,832.18 mi (6,167.31 km) |
| Ironton to Chamusca | 3,866.57 mi (6,222.65 km) |
| Ironton to Chaves | 3,847.30 mi (6,191.62 km) |
| Ironton to Cinfaes | 3,833.72 mi (6,169.78 km) |
| Ironton to Coimbra | 3,844.54 mi (6,187.19 km) |
| Ironton to Condeixa-a-Nova | 3,843.81 mi (6,186.01 km) |
| Ironton to Corroios | 3,855.35 mi (6,204.59 km) |
| Ironton to Coruche | 3,875.86 mi (6,237.59 km) |
| Ironton to Costa de Caparica | 3,850.33 mi (6,196.51 km) |
| Ironton to Covilha | 3,887.11 mi (6,255.69 km) |
| Ironton to Eiras | 3,843.91 mi (6,186.18 km) |
| Ironton to Elvas | 3,945.47 mi (6,349.62 km) |
