| Ionia to Coudekerque-Branche | 3,911.37 mi (6,294.75 km) |
| Ionia to Coueron | 3,875.56 mi (6,237.11 km) |
| Ionia to Coulommiers | 4,013.80 mi (6,459.59 km) |
| Ionia to Courbevoic | 3,978.33 mi (6,402.51 km) |
| Ionia to Courcouronnes | 3,994.78 mi (6,428.98 km) |
| Ionia to Cournon-d'Auvergne | 4,128.85 mi (6,644.74 km) |
| Ionia to Courrieres | 3,951.71 mi (6,359.66 km) |
| Ionia to Coutras | 4,016.62 mi (6,464.12 km) |
| Ionia to Couzeix | 4,043.69 mi (6,507.69 km) |
| Ionia to Cran-Gevrier | 4,240.36 mi (6,824.20 km) |
| Ionia to Craponne | 4,190.76 mi (6,744.38 km) |
| Ionia to Creil | 3,974.91 mi (6,396.99 km) |
| Ionia to Crepy-en-Valois | 3,991.51 mi (6,423.72 km) |
| Ionia to Crest | 4,241.44 mi (6,825.94 km) |
| Ionia to Creteil | 3,990.28 mi (6,421.74 km) |
