| Helena to Chojnice | 4,902.15 mi (7,889.25 km) |
| Helena to Chojnow | 5,002.54 mi (8,050.82 km) |
| Helena to Chorzow | 5,131.12 mi (8,257.75 km) |
| Helena to Choszczno | 4,882.45 mi (7,857.54 km) |
| Helena to Chrzanow | 5,151.52 mi (8,290.57 km) |
| Helena to Ciechanow | 5,019.82 mi (8,078.62 km) |
| Helena to Ciechocinek | 4,977.34 mi (8,010.25 km) |
| Helena to Cieszyn | 5,155.52 mi (8,297.01 km) |
| Helena to Czarna Bialostocka | 5,051.10 mi (8,128.96 km) |
| Helena to Czarnkow | 4,924.91 mi (7,925.88 km) |
| Helena to Czechowice-Dziedzice | 5,155.00 mi (8,296.17 km) |
| Helena to Czeladz | 5,132.35 mi (8,259.72 km) |
| Helena to Czersk Pomorski | 4,906.51 mi (7,896.26 km) |
| Helena to Czestochowa | 5,105.96 mi (8,217.26 km) |
| Helena to Czluchow | 4,899.85 mi (7,885.54 km) |
