| Ottawa to Cognac | 4,206.59 mi (6,769.86 km) |
| Ottawa to Cogolin | 4,581.92 mi (7,373.89 km) |
| Ottawa to Colmar | 4,425.16 mi (7,121.60 km) |
| Ottawa to Colombes | 4,196.61 mi (6,753.80 km) |
| Ottawa to Colomiers | 4,351.84 mi (7,003.61 km) |
| Ottawa to Combs-la-Ville | 4,217.62 mi (6,787.60 km) |
| Ottawa to Comines | 4,161.35 mi (6,697.05 km) |
| Ottawa to Compiegne | 4,201.46 mi (6,761.60 km) |
| Ottawa to Concarneau | 3,984.83 mi (6,412.97 km) |
| Ottawa to Conde-sur-l'Escaut | 4,194.30 mi (6,750.08 km) |
| Ottawa to Conflans-Sainte-Honorine | 4,187.95 mi (6,739.85 km) |
| Ottawa to Corbas | 4,421.33 mi (7,115.45 km) |
| Ottawa to Corbeil-Essonnes | 4,216.56 mi (6,785.89 km) |
| Ottawa to Cormeilles-en-Parisis | 4,192.86 mi (6,747.76 km) |
| Ottawa to Cosne sur Loire | 4,277.29 mi (6,883.64 km) |
