| Niederkassel to Somma Lombardo | 362.85 mi (583.95 km) |
| Niederkassel to Somma Vesuviana | 773.06 mi (1,244.13 km) |
| Niederkassel to Sommacampagna | 413.47 mi (665.42 km) |
| Niederkassel to Sona | 411.04 mi (661.50 km) |
| Niederkassel to Sondrio | 346.29 mi (557.30 km) |
| Niederkassel to Sora | 702.32 mi (1,130.28 km) |
| Niederkassel to Sorbolo | 441.76 mi (710.95 km) |
| Niederkassel to Soresina | 403.66 mi (649.63 km) |
| Niederkassel to Sorisole | 371.03 mi (597.11 km) |
| Niederkassel to Sorrento | 787.08 mi (1,266.69 km) |
| Niederkassel to Sorso | 696.14 mi (1,120.34 km) |
| Niederkassel to Sortino | 1,022.08 mi (1,644.88 km) |
| Niederkassel to Soverato Marina | 957.81 mi (1,541.45 km) |
| Niederkassel to Sovicille | 556.56 mi (895.70 km) |
| Niederkassel to Spello | 602.38 mi (969.43 km) |
