| Helena to Creutzwald | 4,868.90 mi (7,835.74 km) |
| Helena to Croissy-sur-Seine | 4,750.63 mi (7,645.40 km) |
| Helena to Croix | 4,688.76 mi (7,545.82 km) |
| Helena to Crosne | 4,768.73 mi (7,674.53 km) |
| Helena to Cuers | 5,169.04 mi (8,318.77 km) |
| Helena to Cugnaux | 5,000.06 mi (8,046.82 km) |
| Helena to Cusset | 4,933.14 mi (7,939.12 km) |
| Helena to Dammarie-le-Lys | 4,784.32 mi (7,699.62 km) |
| Helena to Dammartin-en-Goele | 4,758.01 mi (7,657.27 km) |
| Helena to Dardilly | 4,990.85 mi (8,031.99 km) |
| Helena to Darnetal | 4,691.49 mi (7,550.22 km) |
| Helena to Dax | 4,911.00 mi (7,903.49 km) |
| Helena to Decines-Charpieu | 4,999.16 mi (8,045.37 km) |
| Helena to Denain | 4,713.87 mi (7,586.25 km) |
| Helena to Deuil-la-Barre | 4,751.22 mi (7,646.34 km) |
