| Ukiah to Cognac | 5,591.46 mi (8,998.59 km) |
| Ukiah to Cogolin | 5,935.26 mi (9,551.88 km) |
| Ukiah to Colmar | 5,691.07 mi (9,158.90 km) |
| Ukiah to Colombes | 5,500.89 mi (8,852.82 km) |
| Ukiah to Colomiers | 5,753.93 mi (9,260.06 km) |
| Ukiah to Combs-la-Ville | 5,523.32 mi (8,888.92 km) |
| Ukiah to Comines | 5,424.93 mi (8,730.57 km) |
| Ukiah to Compiegne | 5,491.31 mi (8,837.41 km) |
| Ukiah to Concarneau | 5,365.73 mi (8,635.31 km) |
| Ukiah to Conde-sur-l'Escaut | 5,457.81 mi (8,783.49 km) |
| Ukiah to Conflans-Sainte-Honorine | 5,492.40 mi (8,839.16 km) |
| Ukiah to Corbas | 5,753.86 mi (9,259.94 km) |
| Ukiah to Corbeil-Essonnes | 5,524.02 mi (8,890.05 km) |
| Ukiah to Cormeilles-en-Parisis | 5,496.74 mi (8,846.15 km) |
| Ukiah to Cosne sur Loire | 5,601.18 mi (9,014.22 km) |
