| Romanshorn to Sestu | 571.15 mi (919.17 km) |
| Romanshorn to Settimo Torinese | 184.22 mi (296.48 km) |
| Romanshorn to Seveso | 133.07 mi (214.16 km) |
| Romanshorn to Sezze | 456.93 mi (735.36 km) |
| Romanshorn to Siano | 536.50 mi (863.42 km) |
| Romanshorn to Siena | 308.52 mi (496.51 km) |
| Romanshorn to Signa | 274.40 mi (441.60 km) |
| Romanshorn to Silea | 191.99 mi (308.98 km) |
| Romanshorn to Silvi Paese | 416.92 mi (670.96 km) |
| Romanshorn to Sinalunga | 321.68 mi (517.69 km) |
| Romanshorn to Siniscola | 483.20 mi (777.64 km) |
| Romanshorn to Sinnai | 570.82 mi (918.65 km) |
| Romanshorn to Siracusa | 785.26 mi (1,263.76 km) |
| Romanshorn to Solaro | 135.25 mi (217.66 km) |
| Romanshorn to Soliera | 209.14 mi (336.57 km) |
