| Willoughby to Coudekerque-Branche | 3,830.01 mi (6,163.80 km) |
| Willoughby to Coueron | 3,775.87 mi (6,076.68 km) |
| Willoughby to Coulommiers | 3,925.52 mi (6,317.51 km) |
| Willoughby to Courbevoic | 3,889.30 mi (6,259.23 km) |
| Willoughby to Courcouronnes | 3,905.03 mi (6,284.54 km) |
| Willoughby to Cournon-d'Auvergne | 4,030.50 mi (6,486.46 km) |
| Willoughby to Courrieres | 3,868.97 mi (6,226.51 km) |
| Willoughby to Coutras | 3,911.63 mi (6,295.16 km) |
| Willoughby to Couzeix | 3,943.20 mi (6,345.97 km) |
| Willoughby to Cran-Gevrier | 4,146.46 mi (6,673.08 km) |
| Willoughby to Craponne | 4,094.47 mi (6,589.41 km) |
| Willoughby to Creil | 3,887.41 mi (6,256.18 km) |
| Willoughby to Crepy-en-Valois | 3,904.42 mi (6,283.56 km) |
| Willoughby to Crest | 4,142.36 mi (6,666.48 km) |
| Willoughby to Creteil | 3,901.14 mi (6,278.28 km) |
