| Opera to Calafell | 480.72 mi (773.65 km) |
| Opera to Calahorra | 596.01 mi (959.18 km) |
| Opera to Calasparra | 747.34 mi (1,202.73 km) |
| Opera to Calatayud | 611.39 mi (983.94 km) |
| Opera to Caldas de Montbuy | 437.83 mi (704.62 km) |
| Opera to Caldas de Reyes | 906.06 mi (1,458.16 km) |
| Opera to Calella | 418.77 mi (673.95 km) |
| Opera to Callosa de Segura | 721.78 mi (1,161.60 km) |
| Opera to Calpe | 661.35 mi (1,064.34 km) |
| Opera to Calvia | 527.38 mi (848.74 km) |
| Opera to Camas | 961.22 mi (1,546.93 km) |
| Opera to Cambados | 916.12 mi (1,474.35 km) |
| Opera to Cambre | 877.57 mi (1,412.31 km) |
| Opera to Cambrils | 507.25 mi (816.34 km) |
| Opera to Campo de Criptana | 751.69 mi (1,209.74 km) |
