| Helena to Castrovillari | 5,667.58 mi (9,121.08 km) |
| Helena to Catania | 5,768.61 mi (9,283.68 km) |
| Helena to Catanzaro | 5,732.37 mi (9,225.35 km) |
| Helena to Cattolica | 5,330.28 mi (8,578.25 km) |
| Helena to Cava de' Tirreni | 5,573.05 mi (8,968.95 km) |
| Helena to Cavallino | 5,695.26 mi (9,165.63 km) |
| Helena to Cavarzere | 5,245.87 mi (8,442.41 km) |
| Helena to Cave | 5,457.51 mi (8,783.01 km) |
| Helena to Cavriago | 5,225.33 mi (8,409.36 km) |
| Helena to Cavriglia | 5,319.11 mi (8,560.28 km) |
| Helena to Cazzago San Martino | 5,161.77 mi (8,307.07 km) |
| Helena to Ceccano | 5,483.48 mi (8,824.81 km) |
| Helena to Cecina | 5,301.55 mi (8,532.02 km) |
| Helena to Cefalu | 5,705.38 mi (9,181.93 km) |
| Helena to Ceglie Messapico | 5,656.18 mi (9,102.74 km) |
