| Helena to Chivasso | 5,119.66 mi (8,239.29 km) |
| Helena to Ciampino | 5,448.58 mi (8,768.64 km) |
| Helena to Cicciano | 5,552.90 mi (8,936.52 km) |
| Helena to Cingoli | 5,378.08 mi (8,655.18 km) |
| Helena to Cinisello Balsamo | 5,139.76 mi (8,271.65 km) |
| Helena to Cinisi | 5,669.67 mi (9,124.45 km) |
| Helena to Cirie | 5,108.59 mi (8,221.48 km) |
| Helena to Ciro Marina | 5,720.30 mi (9,205.93 km) |
| Helena to Cislago | 5,126.91 mi (8,250.96 km) |
| Helena to Cisterna di Latina | 5,467.18 mi (8,798.57 km) |
| Helena to Cisternino | 5,649.45 mi (9,091.91 km) |
| Helena to Citta di Castello | 5,344.55 mi (8,601.22 km) |
| Helena to Citta Sant'Angelo | 5,450.36 mi (8,771.50 km) |
| Helena to Cittadella | 5,208.69 mi (8,382.58 km) |
| Helena to Cittanova | 5,749.15 mi (9,252.36 km) |
