| Alliance to Cognac | 3,898.02 mi (6,273.25 km) |
| Alliance to Cogolin | 4,275.51 mi (6,880.78 km) |
| Alliance to Colmar | 4,142.23 mi (6,666.27 km) |
| Alliance to Colombes | 3,908.24 mi (6,289.71 km) |
| Alliance to Colomiers | 4,036.97 mi (6,496.88 km) |
| Alliance to Combs-la-Ville | 3,928.53 mi (6,322.35 km) |
| Alliance to Comines | 3,883.82 mi (6,250.40 km) |
| Alliance to Compiegne | 3,916.60 mi (6,303.16 km) |
| Alliance to Concarneau | 3,680.72 mi (5,923.54 km) |
| Alliance to Conde-sur-l'Escaut | 3,916.16 mi (6,302.45 km) |
| Alliance to Conflans-Sainte-Honorine | 3,899.68 mi (6,275.93 km) |
| Alliance to Corbas | 4,122.30 mi (6,634.20 km) |
| Alliance to Corbeil-Essonnes | 3,927.04 mi (6,319.97 km) |
| Alliance to Cormeilles-en-Parisis | 3,904.65 mi (6,283.93 km) |
| Alliance to Cosne sur Loire | 3,982.68 mi (6,409.51 km) |
