| Helena to Collegno | 5,116.29 mi (8,233.87 km) |
| Helena to Cologno al Serio | 5,152.15 mi (8,291.59 km) |
| Helena to Cologno Monzese | 5,142.75 mi (8,276.46 km) |
| Helena to Colorno | 5,208.02 mi (8,381.50 km) |
| Helena to Comacchio | 5,273.25 mi (8,486.48 km) |
| Helena to Comiso | 5,785.35 mi (9,310.62 km) |
| Helena to Como | 5,121.67 mi (8,242.53 km) |
| Helena to Concordia Sagittaria | 5,232.31 mi (8,420.59 km) |
| Helena to Concorezzo | 5,141.10 mi (8,273.80 km) |
| Helena to Conegliano | 5,210.04 mi (8,384.74 km) |
| Helena to Conselice | 5,273.43 mi (8,486.76 km) |
| Helena to Conselve | 5,234.34 mi (8,423.85 km) |
| Helena to Conversano | 5,626.95 mi (9,055.71 km) |
| Helena to Copertino | 5,694.00 mi (9,163.60 km) |
| Helena to Copparo | 5,252.00 mi (8,452.28 km) |
