| Helena to Cehegin | 5,171.82 mi (8,323.24 km) |
| Helena to Cervello | 5,132.21 mi (8,259.50 km) |
| Helena to Cervera | 5,094.84 mi (8,199.35 km) |
| Helena to Ceuti | 5,191.61 mi (8,355.09 km) |
| Helena to Cheste | 5,140.34 mi (8,272.57 km) |
| Helena to Chiclana de la Frontera | 5,094.51 mi (8,198.83 km) |
| Helena to Chipiona | 5,067.83 mi (8,155.89 km) |
| Helena to Chiva | 5,139.52 mi (8,271.25 km) |
| Helena to Churriana de la Vega | 5,151.92 mi (8,291.21 km) |
| Helena to Ciempozuelos | 5,000.68 mi (8,047.82 km) |
| Helena to Cieza | 5,178.04 mi (8,333.25 km) |
| Helena to Cisterniga | 4,889.38 mi (7,868.70 km) |
| Helena to Ciudad de Melilla | 5,273.76 mi (8,487.29 km) |
| Helena to Ciudad Real | 5,049.14 mi (8,125.80 km) |
| Helena to Ciudad-Rodrigo | 4,872.30 mi (7,841.21 km) |
