| Troisdorf to Somma Lombardo | 361.67 mi (582.05 km) |
| Troisdorf to Somma Vesuviana | 770.36 mi (1,239.78 km) |
| Troisdorf to Sommacampagna | 411.07 mi (661.56 km) |
| Troisdorf to Sona | 408.64 mi (657.64 km) |
| Troisdorf to Sondrio | 344.19 mi (553.93 km) |
| Troisdorf to Sora | 699.72 mi (1,126.09 km) |
| Troisdorf to Sorbolo | 439.73 mi (707.68 km) |
| Troisdorf to Soresina | 401.84 mi (646.70 km) |
| Troisdorf to Sorisole | 369.20 mi (594.17 km) |
| Troisdorf to Sorrento | 784.44 mi (1,262.44 km) |
| Troisdorf to Sorso | 695.51 mi (1,119.31 km) |
| Troisdorf to Sortino | 1,019.74 mi (1,641.11 km) |
| Troisdorf to Soverato Marina | 954.91 mi (1,536.78 km) |
| Troisdorf to Sovicille | 554.52 mi (892.41 km) |
| Troisdorf to Spello | 599.83 mi (965.34 km) |
