| Rapid City to Collegno | 4,960.65 mi (7,983.40 km) |
| Rapid City to Cologno al Serio | 5,008.11 mi (8,059.78 km) |
| Rapid City to Cologno Monzese | 4,996.64 mi (8,041.32 km) |
| Rapid City to Colorno | 5,063.54 mi (8,148.98 km) |
| Rapid City to Comacchio | 5,135.41 mi (8,264.64 km) |
| Rapid City to Comiso | 5,621.76 mi (9,047.35 km) |
| Rapid City to Como | 4,976.23 mi (8,008.46 km) |
| Rapid City to Concordia Sagittaria | 5,102.72 mi (8,212.04 km) |
| Rapid City to Concorezzo | 4,995.55 mi (8,039.57 km) |
| Rapid City to Conegliano | 5,078.66 mi (8,173.31 km) |
| Rapid City to Conselice | 5,133.13 mi (8,260.97 km) |
| Rapid City to Conselve | 5,097.79 mi (8,204.10 km) |
| Rapid City to Conversano | 5,493.84 mi (8,841.48 km) |
| Rapid City to Copertino | 5,562.21 mi (8,951.50 km) |
| Rapid City to Copparo | 5,113.63 mi (8,229.59 km) |
