| Piqua to Cognac | 4,062.63 mi (6,538.18 km) |
| Piqua to Cogolin | 4,439.86 mi (7,145.27 km) |
| Piqua to Colmar | 4,301.40 mi (6,922.43 km) |
| Piqua to Colombes | 4,068.53 mi (6,547.66 km) |
| Piqua to Colomiers | 4,202.87 mi (6,763.86 km) |
| Piqua to Combs-la-Ville | 4,088.99 mi (6,580.59 km) |
| Piqua to Comines | 4,041.54 mi (6,504.24 km) |
| Piqua to Compiegne | 4,076.08 mi (6,559.82 km) |
| Piqua to Concarneau | 3,844.31 mi (6,186.82 km) |
| Piqua to Conde-sur-l'Escaut | 4,074.06 mi (6,556.56 km) |
| Piqua to Conflans-Sainte-Honorine | 4,059.94 mi (6,533.84 km) |
| Piqua to Corbas | 4,285.06 mi (6,896.13 km) |
| Piqua to Corbeil-Essonnes | 4,087.60 mi (6,578.36 km) |
| Piqua to Cormeilles-en-Parisis | 4,064.90 mi (6,541.82 km) |
| Piqua to Cosne sur Loire | 4,144.41 mi (6,669.78 km) |
