| Effingham to Coudekerque-Branche | 4,225.18 mi (6,799.77 km) |
| Effingham to Coueron | 4,181.05 mi (6,728.75 km) |
| Effingham to Coulommiers | 4,324.88 mi (6,960.23 km) |
| Effingham to Courbevoic | 4,289.08 mi (6,902.60 km) |
| Effingham to Courcouronnes | 4,305.21 mi (6,928.57 km) |
| Effingham to Cournon-d'Auvergne | 4,435.15 mi (7,137.69 km) |
| Effingham to Courrieres | 4,265.02 mi (6,863.88 km) |
| Effingham to Coutras | 4,319.15 mi (6,951.00 km) |
| Effingham to Couzeix | 4,348.81 mi (6,998.74 km) |
| Effingham to Cran-Gevrier | 4,548.95 mi (7,320.84 km) |
| Effingham to Craponne | 4,498.15 mi (7,239.08 km) |
| Effingham to Creil | 4,286.31 mi (6,898.15 km) |
| Effingham to Crepy-en-Valois | 4,303.09 mi (6,925.16 km) |
| Effingham to Crest | 4,547.39 mi (7,318.32 km) |
| Effingham to Creteil | 4,300.98 mi (6,921.76 km) |
