| Helensburgh to Chojnice | 896.44 mi (1,442.68 km) |
| Helensburgh to Chojnow | 903.65 mi (1,454.28 km) |
| Helensburgh to Chorzow | 1,051.12 mi (1,691.62 km) |
| Helensburgh to Choszczno | 827.09 mi (1,331.08 km) |
| Helensburgh to Chrzanow | 1,074.10 mi (1,728.60 km) |
| Helensburgh to Ciechanow | 1,035.93 mi (1,667.17 km) |
| Helensburgh to Ciechocinek | 964.11 mi (1,551.58 km) |
| Helensburgh to Cieszyn | 1,059.41 mi (1,704.95 km) |
| Helensburgh to Czarna Bialostocka | 1,127.28 mi (1,814.18 km) |
| Helensburgh to Czarnkow | 878.29 mi (1,413.48 km) |
| Helensburgh to Czechowice-Dziedzice | 1,067.32 mi (1,717.68 km) |
| Helensburgh to Czeladz | 1,054.97 mi (1,697.81 km) |
| Helensburgh to Czersk Pomorski | 910.72 mi (1,465.66 km) |
| Helensburgh to Czestochowa | 1,039.99 mi (1,673.69 km) |
| Helensburgh to Czluchow | 890.13 mi (1,432.52 km) |
