| Boulder City to Cehegin | 5,779.45 mi (9,301.13 km) |
| Boulder City to Cervello | 5,773.26 mi (9,291.17 km) |
| Boulder City to Cervera | 5,734.56 mi (9,228.88 km) |
| Boulder City to Ceuti | 5,801.51 mi (9,336.63 km) |
| Boulder City to Cheste | 5,760.59 mi (9,270.78 km) |
| Boulder City to Chiclana de la Frontera | 5,671.79 mi (9,127.86 km) |
| Boulder City to Chipiona | 5,645.79 mi (9,086.02 km) |
| Boulder City to Chiva | 5,759.58 mi (9,269.14 km) |
| Boulder City to Churriana de la Vega | 5,745.58 mi (9,246.61 km) |
| Boulder City to Ciempozuelos | 5,612.34 mi (9,032.19 km) |
| Boulder City to Cieza | 5,788.20 mi (9,315.20 km) |
| Boulder City to Cisterniga | 5,505.17 mi (8,859.71 km) |
| Boulder City to Ciudad de Melilla | 5,859.44 mi (9,429.86 km) |
| Boulder City to Ciudad Real | 5,652.58 mi (9,096.95 km) |
| Boulder City to Ciudad-Rodrigo | 5,474.24 mi (8,809.94 km) |
