| Niederkassel to Catania | 1,001.59 mi (1,611.91 km) |
| Niederkassel to Catanzaro | 945.55 mi (1,521.71 km) |
| Niederkassel to Cattolica | 542.84 mi (873.61 km) |
| Niederkassel to Cava de' Tirreni | 789.68 mi (1,270.87 km) |
| Niederkassel to Cavallino | 902.35 mi (1,452.19 km) |
| Niederkassel to Cavarzere | 456.39 mi (734.50 km) |
| Niederkassel to Cave | 682.07 mi (1,097.69 km) |
| Niederkassel to Cavriago | 452.68 mi (728.52 km) |
| Niederkassel to Cavriglia | 545.73 mi (878.26 km) |
| Niederkassel to Cazzago San Martino | 386.98 mi (622.79 km) |
| Niederkassel to Ceccano | 705.96 mi (1,136.13 km) |
| Niederkassel to Cecina | 543.35 mi (874.44 km) |
| Niederkassel to Cefalu | 947.04 mi (1,524.11 km) |
| Niederkassel to Ceglie Messapico | 863.19 mi (1,389.16 km) |
| Niederkassel to Celano | 677.83 mi (1,090.86 km) |
