| Piqua to Cabestany | 4,305.18 mi (6,928.51 km) |
| Piqua to Cabries | 4,383.82 mi (7,055.07 km) |
| Piqua to Cachan | 4,075.89 mi (6,559.52 km) |
| Piqua to Caen | 3,954.15 mi (6,363.58 km) |
| Piqua to Cagnes-sur-Mer | 4,451.09 mi (7,163.33 km) |
| Piqua to Cahors | 4,179.42 mi (6,726.13 km) |
| Piqua to Calais | 3,990.75 mi (6,422.49 km) |
| Piqua to Caluire-et-Cuire | 4,278.37 mi (6,885.38 km) |
| Piqua to Cambrai | 4,068.61 mi (6,547.80 km) |
| Piqua to Canet-en-Roussillon | 4,307.12 mi (6,931.64 km) |
| Piqua to Cannes | 4,449.47 mi (7,160.73 km) |
| Piqua to Canteleu | 4,003.12 mi (6,442.40 km) |
| Piqua to Capbreton | 4,080.28 mi (6,566.58 km) |
| Piqua to Carcassonne | 4,260.87 mi (6,857.21 km) |
| Piqua to Carmaux | 4,223.84 mi (6,797.61 km) |
