| Bad Honnef am Rhein to Somma Lombardo | 349.46 mi (562.40 km) |
| Bad Honnef am Rhein to Somma Vesuviana | 758.56 mi (1,220.78 km) |
| Bad Honnef am Rhein to Sommacampagna | 399.08 mi (642.26 km) |
| Bad Honnef am Rhein to Sona | 396.65 mi (638.34 km) |
| Bad Honnef am Rhein to Sondrio | 332.07 mi (534.42 km) |
| Bad Honnef am Rhein to Sora | 687.85 mi (1,106.98 km) |
| Bad Honnef am Rhein to Sorbolo | 427.59 mi (688.14 km) |
| Bad Honnef am Rhein to Soresina | 389.65 mi (627.08 km) |
| Bad Honnef am Rhein to Sorisole | 357.01 mi (574.55 km) |
| Bad Honnef am Rhein to Sorrento | 772.59 mi (1,243.37 km) |
| Bad Honnef am Rhein to Sorso | 683.42 mi (1,099.86 km) |
| Bad Honnef am Rhein to Sortino | 1,007.72 mi (1,621.77 km) |
| Bad Honnef am Rhein to Soverato Marina | 943.26 mi (1,518.02 km) |
| Bad Honnef am Rhein to Sovicille | 542.38 mi (872.88 km) |
| Bad Honnef am Rhein to Spello | 587.92 mi (946.17 km) |
