| Keystone to Cognac | 4,501.35 mi (7,244.23 km) |
| Keystone to Cogolin | 4,875.19 mi (7,845.86 km) |
| Keystone to Colmar | 4,797.39 mi (7,720.65 km) |
| Keystone to Colombes | 4,557.20 mi (7,334.11 km) |
| Keystone to Colomiers | 4,620.89 mi (7,436.60 km) |
| Keystone to Combs-la-Ville | 4,575.51 mi (7,363.57 km) |
| Keystone to Comines | 4,555.12 mi (7,330.75 km) |
| Keystone to Compiegne | 4,572.65 mi (7,358.96 km) |
| Keystone to Concarneau | 4,300.25 mi (6,920.58 km) |
| Keystone to Conde-sur-l'Escaut | 4,585.60 mi (7,379.81 km) |
| Keystone to Conflans-Sainte-Honorine | 4,549.06 mi (7,321.00 km) |
| Keystone to Corbas | 4,743.01 mi (7,633.14 km) |
| Keystone to Corbeil-Essonnes | 4,573.17 mi (7,359.81 km) |
| Keystone to Cormeilles-en-Parisis | 4,554.03 mi (7,329.01 km) |
| Keystone to Cosne sur Loire | 4,616.53 mi (7,429.59 km) |
