| Irmo to Cortona | 4,799.23 mi (7,723.62 km) |
| Irmo to Cosenza | 5,127.55 mi (8,251.99 km) |
| Irmo to Cossato | 4,559.87 mi (7,338.40 km) |
| Irmo to Costa Volpino | 4,636.19 mi (7,461.22 km) |
| Irmo to Creazzo | 4,705.15 mi (7,572.20 km) |
| Irmo to Crema | 4,632.16 mi (7,454.73 km) |
| Irmo to Cremona | 4,654.54 mi (7,490.76 km) |
| Irmo to Crevalcore | 4,716.27 mi (7,590.11 km) |
| Irmo to Crispiano | 5,124.96 mi (8,247.83 km) |
| Irmo to Crosia | 5,141.41 mi (8,274.30 km) |
| Irmo to Crotone | 5,174.90 mi (8,328.20 km) |
| Irmo to Cuneo | 4,567.18 mi (7,350.17 km) |
| Irmo to Cuorgne | 4,542.29 mi (7,310.11 km) |
| Irmo to Cusano Milanino | 4,604.83 mi (7,410.75 km) |
| Irmo to Cutro | 5,170.64 mi (8,321.34 km) |
