| Onex to Cadiz | 924.02 mi (1,487.06 km) |
| Onex to Calafell | 411.86 mi (662.83 km) |
| Onex to Calahorra | 480.69 mi (773.59 km) |
| Onex to Calasparra | 678.44 mi (1,091.85 km) |
| Onex to Calatayud | 509.88 mi (820.57 km) |
| Onex to Caldas de Montbuy | 370.26 mi (595.87 km) |
| Onex to Caldas de Reyes | 767.18 mi (1,234.66 km) |
| Onex to Calella | 358.81 mi (577.44 km) |
| Onex to Callosa de Segura | 661.22 mi (1,064.13 km) |
| Onex to Calpe | 605.13 mi (973.86 km) |
| Onex to Calvia | 491.99 mi (791.78 km) |
| Onex to Camas | 869.21 mi (1,398.85 km) |
| Onex to Cambados | 777.59 mi (1,251.41 km) |
| Onex to Cambre | 735.03 mi (1,182.92 km) |
| Onex to Cambrils | 434.07 mi (698.57 km) |
