| Ionia to Cognac | 3,985.17 mi (6,413.51 km) |
| Ionia to Cogolin | 4,360.77 mi (7,017.98 km) |
| Ionia to Colmar | 4,206.81 mi (6,770.21 km) |
| Ionia to Colombes | 3,977.41 mi (6,401.02 km) |
| Ionia to Colomiers | 4,129.98 mi (6,646.56 km) |
| Ionia to Combs-la-Ville | 3,998.32 mi (6,434.68 km) |
| Ionia to Comines | 3,943.72 mi (6,346.80 km) |
| Ionia to Compiegne | 3,982.74 mi (6,409.60 km) |
| Ionia to Concarneau | 3,763.75 mi (6,057.17 km) |
| Ionia to Conde-sur-l'Escaut | 3,976.59 mi (6,399.70 km) |
| Ionia to Conflans-Sainte-Honorine | 3,968.75 mi (6,387.09 km) |
| Ionia to Corbas | 4,200.89 mi (6,760.68 km) |
| Ionia to Corbeil-Essonnes | 3,997.21 mi (6,432.88 km) |
| Ionia to Cormeilles-en-Parisis | 3,973.67 mi (6,395.01 km) |
| Ionia to Cosne sur Loire | 4,057.32 mi (6,529.63 km) |
