| Sumner to Coudekerque-Branche | 4,896.05 mi (7,879.43 km) |
| Sumner to Coueron | 4,993.77 mi (8,036.70 km) |
| Sumner to Coulommiers | 5,037.83 mi (8,107.60 km) |
| Sumner to Courbevoic | 5,011.19 mi (8,064.73 km) |
| Sumner to Courcouronnes | 5,031.23 mi (8,096.99 km) |
| Sumner to Cournon-d'Auvergne | 5,214.53 mi (8,391.98 km) |
| Sumner to Courrieres | 4,942.03 mi (7,953.43 km) |
| Sumner to Coutras | 5,159.57 mi (8,303.52 km) |
| Sumner to Couzeix | 5,152.31 mi (8,291.84 km) |
| Sumner to Cran-Gevrier | 5,283.66 mi (8,503.22 km) |
| Sumner to Craponne | 5,255.97 mi (8,458.66 km) |
| Sumner to Creil | 4,997.13 mi (8,042.10 km) |
| Sumner to Crepy-en-Valois | 5,009.12 mi (8,061.40 km) |
| Sumner to Crest | 5,322.43 mi (8,565.62 km) |
| Sumner to Creteil | 5,022.75 mi (8,083.34 km) |
