| Troisdorf to Catania | 999.20 mi (1,608.06 km) |
| Troisdorf to Catanzaro | 942.61 mi (1,516.98 km) |
| Troisdorf to Cattolica | 540.03 mi (869.10 km) |
| Troisdorf to Cava de' Tirreni | 786.94 mi (1,266.45 km) |
| Troisdorf to Cavallino | 898.84 mi (1,446.54 km) |
| Troisdorf to Cavarzere | 453.50 mi (729.84 km) |
| Troisdorf to Cave | 679.67 mi (1,093.82 km) |
| Troisdorf to Cavriago | 450.64 mi (725.24 km) |
| Troisdorf to Cavriglia | 543.53 mi (874.73 km) |
| Troisdorf to Cazzago San Martino | 384.98 mi (619.57 km) |
| Troisdorf to Ceccano | 703.47 mi (1,132.12 km) |
| Troisdorf to Cecina | 541.61 mi (871.64 km) |
| Troisdorf to Cefalu | 944.86 mi (1,520.60 km) |
| Troisdorf to Ceglie Messapico | 859.77 mi (1,383.66 km) |
| Troisdorf to Celano | 675.17 mi (1,086.58 km) |
