| Radolfzell am Bodensee to Somma Lombardo | 142.20 mi (228.85 km) |
| Radolfzell am Bodensee to Somma Vesuviana | 545.44 mi (877.80 km) |
| Radolfzell am Bodensee to Sommacampagna | 184.36 mi (296.70 km) |
| Radolfzell am Bodensee to Sona | 181.95 mi (292.82 km) |
| Radolfzell am Bodensee to Sondrio | 116.13 mi (186.89 km) |
| Radolfzell am Bodensee to Sora | 474.04 mi (762.90 km) |
| Radolfzell am Bodensee to Sorbolo | 211.64 mi (340.60 km) |
| Radolfzell am Bodensee to Soresina | 174.27 mi (280.47 km) |
| Radolfzell am Bodensee to Sorisole | 141.71 mi (228.06 km) |
| Radolfzell am Bodensee to Sorrento | 558.95 mi (899.54 km) |
| Radolfzell am Bodensee to Sorso | 479.55 mi (771.76 km) |
| Radolfzell am Bodensee to Sortino | 792.26 mi (1,275.03 km) |
| Radolfzell am Bodensee to Soverato Marina | 731.87 mi (1,177.83 km) |
| Radolfzell am Bodensee to Sovicille | 326.43 mi (525.33 km) |
| Radolfzell am Bodensee to Spello | 373.81 mi (601.60 km) |
