| Helena to Cockermouth | 4,301.50 mi (6,922.59 km) |
| Helena to Colchester | 4,561.19 mi (7,340.53 km) |
| Helena to Coleford | 4,460.17 mi (7,177.94 km) |
| Helena to Colne | 4,374.51 mi (7,040.10 km) |
| Helena to Colwyn Bay | 4,355.80 mi (7,009.98 km) |
| Helena to Congleton | 4,406.43 mi (7,091.46 km) |
| Helena to Conisbrough | 4,420.51 mi (7,114.12 km) |
| Helena to Connahs Quay | 4,378.59 mi (7,046.66 km) |
| Helena to Consett | 4,337.21 mi (6,980.07 km) |
| Helena to Conwy | 4,352.34 mi (7,004.41 km) |
| Helena to Cookstown | 4,201.07 mi (6,760.97 km) |
| Helena to Corby | 4,484.23 mi (7,216.66 km) |
| Helena to Corfe Mullen | 4,528.05 mi (7,287.19 km) |
| Helena to Corsham | 4,490.63 mi (7,226.98 km) |
| Helena to Coseley | 4,439.84 mi (7,145.24 km) |
