| Helena to Cabestany | 5,097.65 mi (8,203.88 km) |
| Helena to Cabries | 5,136.22 mi (8,265.95 km) |
| Helena to Cachan | 4,760.82 mi (7,661.81 km) |
| Helena to Caen | 4,657.72 mi (7,495.88 km) |
| Helena to Cagnes-sur-Mer | 5,179.79 mi (8,336.07 km) |
| Helena to Cahors | 4,956.19 mi (7,976.22 km) |
| Helena to Calais | 4,636.78 mi (7,462.18 km) |
| Helena to Caluire-et-Cuire | 4,994.31 mi (8,037.57 km) |
| Helena to Cambrai | 4,716.97 mi (7,591.23 km) |
| Helena to Canet-en-Roussillon | 5,098.46 mi (8,205.18 km) |
| Helena to Cannes | 5,181.68 mi (8,339.11 km) |
| Helena to Canteleu | 4,687.64 mi (7,544.03 km) |
| Helena to Capbreton | 4,901.48 mi (7,888.17 km) |
| Helena to Carcassonne | 5,050.37 mi (8,127.79 km) |
| Helena to Carmaux | 5,000.31 mi (8,047.22 km) |
