| Irmo to Collegno | 4,547.92 mi (7,319.18 km) |
| Irmo to Cologno al Serio | 4,626.34 mi (7,445.38 km) |
| Irmo to Cologno Monzese | 4,609.61 mi (7,418.45 km) |
| Irmo to Colorno | 4,675.99 mi (7,525.28 km) |
| Irmo to Comacchio | 4,761.88 mi (7,663.50 km) |
| Irmo to Comiso | 5,135.26 mi (8,264.41 km) |
| Irmo to Como | 4,592.85 mi (7,391.47 km) |
| Irmo to Concordia Sagittaria | 4,756.41 mi (7,654.70 km) |
| Irmo to Concorezzo | 4,610.30 mi (7,419.56 km) |
| Irmo to Conegliano | 4,728.98 mi (7,610.55 km) |
| Irmo to Conselice | 4,752.48 mi (7,648.37 km) |
| Irmo to Conselve | 4,731.15 mi (7,614.06 km) |
| Irmo to Conversano | 5,106.50 mi (8,218.12 km) |
| Irmo to Copertino | 5,173.59 mi (8,326.09 km) |
| Irmo to Copparo | 4,740.28 mi (7,628.74 km) |
