| Ionia to Cortona | 4,581.35 mi (7,372.97 km) |
| Ionia to Cosenza | 4,926.31 mi (7,928.12 km) |
| Ionia to Cossato | 4,335.75 mi (6,977.71 km) |
| Ionia to Costa Volpino | 4,401.45 mi (7,083.45 km) |
| Ionia to Creazzo | 4,467.56 mi (7,189.84 km) |
| Ionia to Crema | 4,403.78 mi (7,087.19 km) |
| Ionia to Cremona | 4,427.01 mi (7,124.59 km) |
| Ionia to Crevalcore | 4,488.09 mi (7,222.88 km) |
| Ionia to Crispiano | 4,906.99 mi (7,897.03 km) |
| Ionia to Crosia | 4,935.11 mi (7,942.29 km) |
| Ionia to Crotone | 4,971.16 mi (8,000.30 km) |
| Ionia to Cuneo | 4,357.73 mi (7,013.09 km) |
| Ionia to Cuorgne | 4,322.10 mi (6,955.75 km) |
| Ionia to Cusano Milanino | 4,376.69 mi (7,043.60 km) |
| Ionia to Cutro | 4,968.04 mi (7,995.28 km) |
