| Opelika to Cascais | 4,160.13 mi (6,695.09 km) |
| Opelika to Castelo Branco | 4,230.23 mi (6,807.90 km) |
| Opelika to Castro Daire | 4,183.51 mi (6,732.71 km) |
| Opelika to Celorico de Basto | 4,169.26 mi (6,709.78 km) |
| Opelika to Chamusca | 4,192.05 mi (6,746.45 km) |
| Opelika to Chaves | 4,187.03 mi (6,738.37 km) |
| Opelika to Cinfaes | 4,169.11 mi (6,709.54 km) |
| Opelika to Coimbra | 4,174.74 mi (6,718.60 km) |
| Opelika to Condeixa-a-Nova | 4,173.39 mi (6,716.42 km) |
| Opelika to Corroios | 4,175.63 mi (6,720.03 km) |
| Opelika to Coruche | 4,199.12 mi (6,757.83 km) |
| Opelika to Costa de Caparica | 4,170.62 mi (6,711.97 km) |
| Opelika to Covilha | 4,219.21 mi (6,790.17 km) |
| Opelika to Eiras | 4,174.29 mi (6,717.87 km) |
| Opelika to Elvas | 4,270.67 mi (6,872.99 km) |
