| Mountain Ash to Cognac | 436.23 mi (702.05 km) |
| Mountain Ash to Cogolin | 742.52 mi (1,194.97 km) |
| Mountain Ash to Colmar | 538.05 mi (865.90 km) |
| Mountain Ash to Colombes | 313.02 mi (503.75 km) |
| Mountain Ash to Colomiers | 598.76 mi (963.61 km) |
| Mountain Ash to Combs-la-Ville | 335.02 mi (539.17 km) |
| Mountain Ash to Comines | 283.51 mi (456.27 km) |
| Mountain Ash to Compiegne | 313.97 mi (505.29 km) |
| Mountain Ash to Concarneau | 264.07 mi (424.99 km) |
| Mountain Ash to Conde-sur-l'Escaut | 314.24 mi (505.72 km) |
| Mountain Ash to Conflans-Sainte-Honorine | 304.31 mi (489.74 km) |
| Mountain Ash to Corbas | 560.88 mi (902.66 km) |
| Mountain Ash to Corbeil-Essonnes | 334.88 mi (538.94 km) |
| Mountain Ash to Cormeilles-en-Parisis | 309.03 mi (497.33 km) |
| Mountain Ash to Cosne sur Loire | 408.32 mi (657.13 km) |
