| Boulder City to Cortona | 6,032.65 mi (9,708.61 km) |
| Boulder City to Cosenza | 6,385.26 mi (10,276.08 km) |
| Boulder City to Cossato | 5,789.02 mi (9,316.53 km) |
| Boulder City to Costa Volpino | 5,838.52 mi (9,396.20 km) |
| Boulder City to Creazzo | 5,898.09 mi (9,492.06 km) |
| Boulder City to Crema | 5,848.92 mi (9,412.93 km) |
| Boulder City to Cremona | 5,872.30 mi (9,450.55 km) |
| Boulder City to Crevalcore | 5,930.03 mi (9,543.46 km) |
| Boulder City to Crispiano | 6,345.37 mi (10,211.89 km) |
| Boulder City to Crosia | 6,387.41 mi (10,279.54 km) |
| Boulder City to Crotone | 6,425.32 mi (10,340.56 km) |
| Boulder City to Cuneo | 5,827.92 mi (9,379.13 km) |
| Boulder City to Cuorgne | 5,780.77 mi (9,303.24 km) |
| Boulder City to Cusano Milanino | 5,823.25 mi (9,371.62 km) |
| Boulder City to Cutro | 6,423.76 mi (10,338.04 km) |
