| Helensburgh to Caltagirone | 1,574.98 mi (2,534.69 km) |
| Helensburgh to Caltanissetta | 1,547.89 mi (2,491.08 km) |
| Helensburgh to Calvisano | 985.21 mi (1,585.55 km) |
| Helensburgh to Calvizzano | 1,348.06 mi (2,169.49 km) |
| Helensburgh to Camaiore | 1,064.45 mi (1,713.06 km) |
| Helensburgh to Cameri | 929.48 mi (1,495.86 km) |
| Helensburgh to Camisano Vicentino | 1,016.36 mi (1,635.68 km) |
| Helensburgh to Campagna | 1,387.80 mi (2,233.45 km) |
| Helensburgh to Campagnano di Roma | 1,226.00 mi (1,973.06 km) |
| Helensburgh to Campi Bisenzio | 1,094.11 mi (1,760.80 km) |
| Helensburgh to Campi Salentina | 1,490.35 mi (2,398.49 km) |
| Helensburgh to Campiglia Marittima | 1,123.48 mi (1,808.07 km) |
| Helensburgh to Campobasso | 1,323.63 mi (2,130.18 km) |
| Helensburgh to Campobello di Licata | 1,558.79 mi (2,508.63 km) |
| Helensburgh to Campobello di Mazara | 1,505.88 mi (2,423.47 km) |
