| Piqua to Coudekerque-Branche | 4,009.40 mi (6,452.50 km) |
| Piqua to Coueron | 3,956.40 mi (6,367.21 km) |
| Piqua to Coulommiers | 4,105.54 mi (6,607.22 km) |
| Piqua to Courbevoic | 4,069.37 mi (6,549.02 km) |
| Piqua to Courcouronnes | 4,085.15 mi (6,574.41 km) |
| Piqua to Cournon-d'Auvergne | 4,211.01 mi (6,776.96 km) |
| Piqua to Courrieres | 4,048.51 mi (6,515.44 km) |
| Piqua to Coutras | 4,092.17 mi (6,585.72 km) |
| Piqua to Couzeix | 4,123.75 mi (6,636.53 km) |
| Piqua to Cran-Gevrier | 4,326.82 mi (6,963.35 km) |
| Piqua to Craponne | 4,274.93 mi (6,879.83 km) |
| Piqua to Creil | 4,067.36 mi (6,545.79 km) |
| Piqua to Crepy-en-Valois | 4,084.35 mi (6,573.13 km) |
| Piqua to Crest | 4,322.88 mi (6,957.01 km) |
| Piqua to Creteil | 4,081.22 mi (6,568.09 km) |
