| Piqua to Cividale del Friuli | 4,616.02 mi (7,428.77 km) |
| Piqua to Civita Castellana | 4,724.76 mi (7,603.76 km) |
| Piqua to Civitanova Marche | 4,739.22 mi (7,627.03 km) |
| Piqua to Civitavecchia | 4,707.02 mi (7,575.21 km) |
| Piqua to Civitella in Val di Chiana | 4,651.67 mi (7,486.13 km) |
| Piqua to Clusone | 4,485.02 mi (7,217.94 km) |
| Piqua to Coccaglio | 4,498.13 mi (7,239.04 km) |
| Piqua to Codigoro | 4,612.77 mi (7,423.54 km) |
| Piqua to Codogno | 4,502.08 mi (7,245.40 km) |
| Piqua to Codroipo | 4,603.42 mi (7,408.49 km) |
| Piqua to Cogoleto | 4,487.14 mi (7,221.36 km) |
| Piqua to Colle di Val d'Elsa | 4,628.15 mi (7,448.29 km) |
| Piqua to Colle Salvetti | 4,593.42 mi (7,392.39 km) |
| Piqua to Collecchio | 4,538.50 mi (7,304.01 km) |
| Piqua to Colleferro | 4,772.69 mi (7,680.90 km) |
