| Castaic to Coudekerque-Branche | 5,530.38 mi (8,900.29 km) |
| Castaic to Coueron | 5,573.82 mi (8,970.19 km) |
| Castaic to Coulommiers | 5,659.42 mi (9,107.95 km) |
| Castaic to Courbevoic | 5,628.55 mi (9,058.28 km) |
| Castaic to Courcouronnes | 5,647.53 mi (9,088.83 km) |
| Castaic to Cournon-d'Auvergne | 5,813.55 mi (9,356.01 km) |
| Castaic to Courrieres | 5,575.16 mi (8,972.35 km) |
| Castaic to Coutras | 5,731.59 mi (9,224.10 km) |
| Castaic to Couzeix | 5,739.89 mi (9,237.46 km) |
| Castaic to Cran-Gevrier | 5,902.34 mi (9,498.90 km) |
| Castaic to Craponne | 5,864.74 mi (9,438.39 km) |
| Castaic to Creil | 5,618.58 mi (9,042.22 km) |
| Castaic to Crepy-en-Valois | 5,632.72 mi (9,064.99 km) |
| Castaic to Crest | 5,925.65 mi (9,536.42 km) |
| Castaic to Creteil | 5,640.52 mi (9,077.55 km) |
