| Piqua to Cadiz | 4,090.03 mi (6,582.27 km) |
| Piqua to Calafell | 4,296.15 mi (6,913.99 km) |
| Piqua to Calahorra | 4,100.07 mi (6,598.43 km) |
| Piqua to Calasparra | 4,250.26 mi (6,840.13 km) |
| Piqua to Calatayud | 4,146.58 mi (6,673.28 km) |
| Piqua to Caldas de Montbuy | 4,307.69 mi (6,932.56 km) |
| Piqua to Caldas de Reyes | 3,786.79 mi (6,094.26 km) |
| Piqua to Calella | 4,330.32 mi (6,968.97 km) |
| Piqua to Callosa de Segura | 4,292.41 mi (6,907.96 km) |
| Piqua to Calpe | 4,316.83 mi (6,947.26 km) |
| Piqua to Calvia | 4,396.61 mi (7,075.66 km) |
| Piqua to Camas | 4,073.40 mi (6,555.51 km) |
| Piqua to Cambados | 3,782.34 mi (6,087.10 km) |
| Piqua to Cambre | 3,781.01 mi (6,084.95 km) |
| Piqua to Cambrils | 4,277.78 mi (6,884.43 km) |
