| Piqua to Cortona | 4,668.43 mi (7,513.11 km) |
| Piqua to Cosenza | 5,009.40 mi (8,061.85 km) |
| Piqua to Cossato | 4,423.96 mi (7,119.67 km) |
| Piqua to Costa Volpino | 4,493.03 mi (7,230.83 km) |
| Piqua to Creazzo | 4,560.18 mi (7,338.89 km) |
| Piqua to Crema | 4,493.46 mi (7,231.53 km) |
| Piqua to Cremona | 4,516.51 mi (7,268.63 km) |
| Piqua to Crevalcore | 4,577.97 mi (7,367.52 km) |
| Piqua to Crispiano | 4,995.00 mi (8,038.68 km) |
| Piqua to Crosia | 5,019.73 mi (8,078.48 km) |
| Piqua to Crotone | 5,055.12 mi (8,135.43 km) |
| Piqua to Cuneo | 4,441.62 mi (7,148.09 km) |
| Piqua to Cuorgne | 4,409.10 mi (7,095.75 km) |
| Piqua to Cusano Milanino | 4,466.22 mi (7,187.69 km) |
| Piqua to Cutro | 5,051.65 mi (8,129.85 km) |
