| Ottawa to Coudekerque-Branche | 4,128.97 mi (6,644.94 km) |
| Ottawa to Coueron | 4,096.58 mi (6,592.81 km) |
| Ottawa to Coulommiers | 4,232.86 mi (6,812.14 km) |
| Ottawa to Courbevoic | 4,197.56 mi (6,755.32 km) |
| Ottawa to Courcouronnes | 4,214.14 mi (6,782.01 km) |
| Ottawa to Cournon-d'Auvergne | 4,349.62 mi (7,000.04 km) |
| Ottawa to Courrieres | 4,169.60 mi (6,710.33 km) |
| Ottawa to Coutras | 4,238.24 mi (6,820.79 km) |
| Ottawa to Couzeix | 4,264.78 mi (6,863.50 km) |
| Ottawa to Cran-Gevrier | 4,460.39 mi (7,178.31 km) |
| Ottawa to Craponne | 4,411.20 mi (7,099.15 km) |
| Ottawa to Creil | 4,193.83 mi (6,749.31 km) |
| Ottawa to Crepy-en-Valois | 4,210.34 mi (6,775.88 km) |
| Ottawa to Crest | 4,462.29 mi (7,181.37 km) |
| Ottawa to Creteil | 4,209.52 mi (6,774.57 km) |
