| Longmont to Cognac | 4,905.76 mi (7,895.06 km) |
| Longmont to Cogolin | 5,271.85 mi (8,484.22 km) |
| Longmont to Colmar | 5,074.41 mi (8,166.47 km) |
| Longmont to Colombes | 4,859.76 mi (7,821.03 km) |
| Longmont to Colomiers | 5,060.26 mi (8,143.70 km) |
| Longmont to Combs-la-Ville | 4,881.70 mi (7,856.34 km) |
| Longmont to Comines | 4,805.59 mi (7,733.84 km) |
| Longmont to Compiegne | 4,858.18 mi (7,818.49 km) |
| Longmont to Concarneau | 4,679.47 mi (7,530.88 km) |
| Longmont to Conde-sur-l'Escaut | 4,839.01 mi (7,787.64 km) |
| Longmont to Conflans-Sainte-Honorine | 4,851.05 mi (7,807.00 km) |
| Longmont to Corbas | 5,100.12 mi (8,207.85 km) |
| Longmont to Corbeil-Essonnes | 4,881.42 mi (7,855.88 km) |
| Longmont to Cormeilles-en-Parisis | 4,855.78 mi (7,814.62 km) |
| Longmont to Cosne sur Loire | 4,950.34 mi (7,966.80 km) |
