| Helena to Caldicot | 4,465.70 mi (7,186.85 km) |
| Helena to Calne | 4,495.97 mi (7,235.56 km) |
| Helena to Cam | 4,472.22 mi (7,197.35 km) |
| Helena to Camberley | 4,539.51 mi (7,305.64 km) |
| Helena to Camborne | 4,450.94 mi (7,163.10 km) |
| Helena to Cambridge | 4,522.45 mi (7,278.18 km) |
| Helena to Cambuslang | 4,224.30 mi (6,798.35 km) |
| Helena to Canford Cliffs | 4,534.17 mi (7,297.05 km) |
| Helena to Cannock | 4,434.74 mi (7,137.02 km) |
| Helena to Canterbury | 4,597.00 mi (7,398.16 km) |
| Helena to Carlisle | 4,302.97 mi (6,924.96 km) |
| Helena to Carlton Colville | 4,556.17 mi (7,332.45 km) |
| Helena to Carluke | 4,237.86 mi (6,820.18 km) |
| Helena to Carnoustie | 4,234.43 mi (6,814.65 km) |
| Helena to Carshalton | 4,555.39 mi (7,331.19 km) |
