| Helena to Cernavoda | 5,698.33 mi (9,170.58 km) |
| Helena to Chitila | 5,641.81 mi (9,079.61 km) |
| Helena to Cisnadie | 5,526.21 mi (8,893.58 km) |
| Helena to Cluj-Napoca | 5,449.40 mi (8,769.96 km) |
| Helena to Codlea | 5,556.95 mi (8,943.05 km) |
| Helena to Comanesti | 5,534.69 mi (8,907.22 km) |
| Helena to Comarnic | 5,588.50 mi (8,993.82 km) |
| Helena to Constanta | 5,722.07 mi (9,208.79 km) |
| Helena to Corabia | 5,652.03 mi (9,096.07 km) |
| Helena to Costesti | 5,606.48 mi (9,022.76 km) |
| Helena to Covasna | 5,564.36 mi (8,954.97 km) |
| Helena to Craiova | 5,601.73 mi (9,015.11 km) |
| Helena to Cristuru Secuiesc | 5,511.47 mi (8,869.85 km) |
| Helena to Cugir | 5,499.85 mi (8,851.15 km) |
| Helena to Cumpana | 5,723.73 mi (9,211.45 km) |
