| Ionia to Cividale del Friuli | 4,519.19 mi (7,272.94 km) |
| Ionia to Civita Castellana | 4,639.74 mi (7,466.95 km) |
| Ionia to Civitanova Marche | 4,649.51 mi (7,482.67 km) |
| Ionia to Civitavecchia | 4,623.46 mi (7,440.75 km) |
| Ionia to Civitella in Val di Chiana | 4,564.60 mi (7,346.01 km) |
| Ionia to Clusone | 4,393.49 mi (7,070.65 km) |
| Ionia to Coccaglio | 4,407.48 mi (7,093.15 km) |
| Ionia to Codigoro | 4,521.21 mi (7,276.19 km) |
| Ionia to Codogno | 4,412.96 mi (7,101.97 km) |
| Ionia to Codroipo | 4,507.58 mi (7,254.24 km) |
| Ionia to Cogoleto | 4,401.71 mi (7,083.86 km) |
| Ionia to Colle di Val d'Elsa | 4,541.98 mi (7,309.61 km) |
| Ionia to Colle Salvetti | 4,507.63 mi (7,254.32 km) |
| Ionia to Collecchio | 4,449.84 mi (7,161.32 km) |
| Ionia to Colleferro | 4,688.29 mi (7,545.07 km) |
