| Boulder City to Caltagirone | 6,438.85 mi (10,362.33 km) |
| Boulder City to Caltanissetta | 6,409.73 mi (10,315.47 km) |
| Boulder City to Calvisano | 5,871.30 mi (9,448.94 km) |
| Boulder City to Calvizzano | 6,230.81 mi (10,027.53 km) |
| Boulder City to Camaiore | 5,942.93 mi (9,564.22 km) |
| Boulder City to Cameri | 5,808.33 mi (9,347.60 km) |
| Boulder City to Camisano Vicentino | 5,906.34 mi (9,505.34 km) |
| Boulder City to Campagna | 6,273.37 mi (10,096.01 km) |
| Boulder City to Campagnano di Roma | 6,105.81 mi (9,826.36 km) |
| Boulder City to Campi Bisenzio | 5,976.38 mi (9,618.06 km) |
| Boulder City to Campi Salentina | 6,381.05 mi (10,269.30 km) |
| Boulder City to Campiglia Marittima | 5,998.31 mi (9,653.34 km) |
| Boulder City to Campobasso | 6,210.67 mi (9,995.11 km) |
| Boulder City to Campobello di Licata | 6,417.55 mi (10,328.05 km) |
| Boulder City to Campobello di Mazara | 6,356.36 mi (10,229.57 km) |
