| Irmo to Coudekerque-Branche | 4,172.77 mi (6,715.42 km) |
| Irmo to Coueron | 4,080.19 mi (6,566.43 km) |
| Irmo to Coulommiers | 4,253.08 mi (6,844.68 km) |
| Irmo to Courbevoic | 4,215.69 mi (6,784.49 km) |
| Irmo to Courcouronnes | 4,229.70 mi (6,807.05 km) |
| Irmo to Cournon-d'Auvergne | 4,334.97 mi (6,976.47 km) |
| Irmo to Courrieres | 4,208.58 mi (6,773.06 km) |
| Irmo to Coutras | 4,202.10 mi (6,762.63 km) |
| Irmo to Couzeix | 4,243.78 mi (6,829.71 km) |
| Irmo to Cran-Gevrier | 4,459.63 mi (7,177.08 km) |
| Irmo to Craponne | 4,402.89 mi (7,085.77 km) |
| Irmo to Creil | 4,217.03 mi (6,786.65 km) |
| Irmo to Crepy-en-Valois | 4,234.72 mi (6,815.13 km) |
| Irmo to Crest | 4,443.96 mi (7,151.87 km) |
| Irmo to Creteil | 4,227.17 mi (6,802.97 km) |
