| Duluth to Coudekerque-Branche | 3,995.53 mi (6,430.19 km) |
| Duluth to Coueron | 4,000.47 mi (6,438.14 km) |
| Duluth to Coulommiers | 4,111.93 mi (6,617.52 km) |
| Duluth to Courbevoic | 4,078.51 mi (6,563.72 km) |
| Duluth to Courcouronnes | 4,096.37 mi (6,592.47 km) |
| Duluth to Cournon-d'Auvergne | 4,248.01 mi (6,836.51 km) |
| Duluth to Courrieres | 4,038.38 mi (6,499.14 km) |
| Duluth to Coutras | 4,151.80 mi (6,681.68 km) |
| Duluth to Couzeix | 4,168.52 mi (6,708.59 km) |
| Duluth to Cran-Gevrier | 4,348.46 mi (6,998.16 km) |
| Duluth to Craponne | 4,304.68 mi (6,927.72 km) |
| Duluth to Creil | 4,071.75 mi (6,552.85 km) |
| Duluth to Crepy-en-Valois | 4,087.26 mi (6,577.81 km) |
| Duluth to Crest | 4,361.07 mi (7,018.46 km) |
| Duluth to Creteil | 4,090.56 mi (6,583.12 km) |
