| Diamond Bar to Coudekerque-Branche | 5,532.64 mi (8,903.93 km) |
| Diamond Bar to Coueron | 5,571.39 mi (8,966.28 km) |
| Diamond Bar to Coulommiers | 5,660.39 mi (9,109.51 km) |
| Diamond Bar to Courbevoic | 5,629.20 mi (9,059.32 km) |
| Diamond Bar to Courcouronnes | 5,648.06 mi (9,089.67 km) |
| Diamond Bar to Cournon-d'Auvergne | 5,812.38 mi (9,354.11 km) |
| Diamond Bar to Courrieres | 5,577.25 mi (8,975.72 km) |
| Diamond Bar to Coutras | 5,728.28 mi (9,218.77 km) |
| Diamond Bar to Couzeix | 5,737.85 mi (9,234.18 km) |
| Diamond Bar to Cran-Gevrier | 5,902.73 mi (9,499.53 km) |
| Diamond Bar to Craponne | 5,864.32 mi (9,437.72 km) |
| Diamond Bar to Creil | 5,619.59 mi (9,043.85 km) |
| Diamond Bar to Crepy-en-Valois | 5,633.90 mi (9,066.88 km) |
| Diamond Bar to Crest | 5,924.68 mi (9,534.85 km) |
| Diamond Bar to Creteil | 5,641.19 mi (9,078.61 km) |
