| Ionia to Collegno | 4,331.26 mi (6,970.49 km) |
| Ionia to Cologno al Serio | 4,395.73 mi (7,074.24 km) |
| Ionia to Cologno Monzese | 4,381.30 mi (7,051.01 km) |
| Ionia to Colorno | 4,448.96 mi (7,159.91 km) |
| Ionia to Comacchio | 4,529.38 mi (7,289.32 km) |
| Ionia to Comiso | 4,964.18 mi (7,989.07 km) |
| Ionia to Como | 4,362.49 mi (7,020.75 km) |
| Ionia to Concordia Sagittaria | 4,510.78 mi (7,259.39 km) |
| Ionia to Concorezzo | 4,381.13 mi (7,050.74 km) |
| Ionia to Conegliano | 4,484.52 mi (7,217.14 km) |
| Ionia to Conselice | 4,523.28 mi (7,279.51 km) |
| Ionia to Conselve | 4,494.86 mi (7,233.77 km) |
| Ionia to Conversano | 4,885.81 mi (7,862.95 km) |
| Ionia to Copertino | 4,954.48 mi (7,973.47 km) |
| Ionia to Copparo | 4,507.35 mi (7,253.89 km) |
