| Castlebar to Coudekerque-Branche | 529.12 mi (851.53 km) |
| Castlebar to Coueron | 566.32 mi (911.40 km) |
| Castlebar to Coulommiers | 636.75 mi (1,024.75 km) |
| Castlebar to Courbevoic | 603.63 mi (971.45 km) |
| Castlebar to Courcouronnes | 621.86 mi (1,000.79 km) |
| Castlebar to Cournon-d'Auvergne | 788.53 mi (1,269.01 km) |
| Castlebar to Courrieres | 568.85 mi (915.47 km) |
| Castlebar to Coutras | 734.24 mi (1,181.64 km) |
| Castlebar to Couzeix | 722.74 mi (1,163.13 km) |
| Castlebar to Cran-Gevrier | 875.73 mi (1,409.35 km) |
| Castlebar to Craponne | 837.18 mi (1,347.32 km) |
| Castlebar to Creil | 596.59 mi (960.12 km) |
| Castlebar to Crepy-en-Valois | 612.25 mi (985.32 km) |
| Castlebar to Crest | 899.38 mi (1,447.41 km) |
| Castlebar to Creteil | 615.68 mi (990.85 km) |
