| Helena to Cadiz | 5,082.94 mi (8,180.21 km) |
| Helena to Calafell | 5,129.24 mi (8,254.72 km) |
| Helena to Calahorra | 4,951.05 mi (7,967.95 km) |
| Helena to Calasparra | 5,168.31 mi (8,317.58 km) |
| Helena to Calatayud | 5,010.96 mi (8,064.35 km) |
| Helena to Caldas de Montbuy | 5,126.85 mi (8,250.87 km) |
| Helena to Caldas de Reyes | 4,697.77 mi (7,560.32 km) |
| Helena to Calella | 5,144.35 mi (8,279.04 km) |
| Helena to Callosa de Segura | 5,203.52 mi (8,374.25 km) |
| Helena to Calpe | 5,209.45 mi (8,383.80 km) |
| Helena to Calvia | 5,247.14 mi (8,444.46 km) |
| Helena to Camas | 5,049.65 mi (8,126.63 km) |
| Helena to Cambados | 4,696.75 mi (7,558.69 km) |
| Helena to Cambre | 4,676.36 mi (7,525.87 km) |
| Helena to Cambrils | 5,118.70 mi (8,237.75 km) |
