| Helena to Corato | 5,596.07 mi (9,006.01 km) |
| Helena to Corbetta | 5,135.44 mi (8,264.69 km) |
| Helena to Corciano | 5,364.11 mi (8,632.70 km) |
| Helena to Cordenons | 5,215.94 mi (8,394.25 km) |
| Helena to Cori | 5,466.64 mi (8,797.71 km) |
| Helena to Coriano | 5,326.43 mi (8,572.07 km) |
| Helena to Corigliano Calabro | 5,689.30 mi (9,156.04 km) |
| Helena to Corleone | 5,695.76 mi (9,166.45 km) |
| Helena to Cormano | 5,138.28 mi (8,269.27 km) |
| Helena to Cornaredo | 5,137.07 mi (8,267.32 km) |
| Helena to Cornate d'Adda | 5,141.64 mi (8,274.68 km) |
| Helena to Cornedo Vicentino | 5,198.16 mi (8,365.63 km) |
| Helena to Correggio | 5,228.73 mi (8,414.82 km) |
| Helena to Corridonia | 5,393.33 mi (8,679.72 km) |
| Helena to Corsico | 5,143.19 mi (8,277.17 km) |
