| Rock Island to Cernavoda | 5,396.41 mi (8,684.69 km) |
| Rock Island to Chitila | 5,318.94 mi (8,560.01 km) |
| Rock Island to Cisnadie | 5,197.04 mi (8,363.83 km) |
| Rock Island to Cluj-Napoca | 5,126.38 mi (8,250.11 km) |
| Rock Island to Codlea | 5,241.45 mi (8,435.30 km) |
| Rock Island to Comanesti | 5,238.22 mi (8,430.10 km) |
| Rock Island to Comarnic | 5,270.08 mi (8,481.37 km) |
| Rock Island to Constanta | 5,425.09 mi (8,730.83 km) |
| Rock Island to Corabia | 5,304.79 mi (8,537.23 km) |
| Rock Island to Costesti | 5,273.37 mi (8,486.66 km) |
| Rock Island to Covasna | 5,258.57 mi (8,462.85 km) |
| Rock Island to Craiova | 5,253.30 mi (8,454.38 km) |
| Rock Island to Cristuru Secuiesc | 5,198.30 mi (8,365.86 km) |
| Rock Island to Cugir | 5,163.84 mi (8,310.39 km) |
| Rock Island to Cumpana | 5,425.29 mi (8,731.16 km) |
