| Opelika to Cadiz | 4,373.14 mi (7,037.89 km) |
| Opelika to Calafell | 4,635.73 mi (7,460.49 km) |
| Opelika to Calahorra | 4,438.28 mi (7,142.73 km) |
| Opelika to Calasparra | 4,559.90 mi (7,338.44 km) |
| Opelika to Calatayud | 4,478.86 mi (7,208.03 km) |
| Opelika to Caldas de Montbuy | 4,651.76 mi (7,486.28 km) |
| Opelika to Caldas de Reyes | 4,111.42 mi (6,616.68 km) |
| Opelika to Calella | 4,675.57 mi (7,524.60 km) |
| Opelika to Callosa de Segura | 4,603.66 mi (7,408.88 km) |
| Opelika to Calpe | 4,634.49 mi (7,458.49 km) |
| Opelika to Calvia | 4,727.67 mi (7,608.44 km) |
| Opelika to Camas | 4,364.08 mi (7,023.31 km) |
| Opelika to Cambados | 4,105.78 mi (6,607.62 km) |
| Opelika to Cambre | 4,111.66 mi (6,617.07 km) |
| Opelika to Cambrils | 4,615.10 mi (7,427.29 km) |
