| Altena to Chitila | 965.68 mi (1,554.12 km) |
| Altena to Cisnadie | 845.01 mi (1,359.91 km) |
| Altena to Cluj-Napoca | 784.03 mi (1,261.77 km) |
| Altena to Codlea | 898.21 mi (1,445.54 km) |
| Altena to Comanesti | 914.46 mi (1,471.68 km) |
| Altena to Comarnic | 922.64 mi (1,484.85 km) |
| Altena to Constanta | 1,086.62 mi (1,748.75 km) |
| Altena to Corabia | 938.47 mi (1,510.33 km) |
| Altena to Costesti | 915.20 mi (1,472.88 km) |
| Altena to Covasna | 923.26 mi (1,485.84 km) |
| Altena to Craiova | 887.63 mi (1,428.51 km) |
| Altena to Cristuru Secuiesc | 860.24 mi (1,384.42 km) |
| Altena to Cugir | 808.34 mi (1,300.90 km) |
| Altena to Cumpana | 1,085.56 mi (1,747.05 km) |
| Altena to Curtea de Arges | 888.39 mi (1,429.73 km) |
