| Boulder City to Castrovillari | 6,355.37 mi (10,227.98 km) |
| Boulder City to Catania | 6,444.50 mi (10,371.42 km) |
| Boulder City to Catanzaro | 6,418.61 mi (10,329.75 km) |
| Boulder City to Cattolica | 6,020.26 mi (9,688.66 km) |
| Boulder City to Cava de' Tirreni | 6,258.52 mi (10,072.11 km) |
| Boulder City to Cavallino | 6,391.40 mi (10,285.97 km) |
| Boulder City to Cavarzere | 5,937.80 mi (9,555.96 km) |
| Boulder City to Cave | 6,140.73 mi (9,882.55 km) |
| Boulder City to Cavriago | 5,910.92 mi (9,512.71 km) |
| Boulder City to Cavriglia | 6,003.50 mi (9,661.70 km) |
| Boulder City to Cazzago San Martino | 5,848.97 mi (9,413.01 km) |
| Boulder City to Ceccano | 6,167.20 mi (9,925.15 km) |
| Boulder City to Cecina | 5,982.02 mi (9,627.13 km) |
| Boulder City to Cefalu | 6,379.04 mi (10,266.08 km) |
| Boulder City to Ceglie Messapico | 6,351.00 mi (10,220.94 km) |
