| Romanshorn to Sesena | 828.18 mi (1,332.82 km) |
| Romanshorn to Sestao | 666.45 mi (1,072.55 km) |
| Romanshorn to Sevilla | 1,055.63 mi (1,698.87 km) |
| Romanshorn to Sevilla La Nueva | 829.83 mi (1,335.48 km) |
| Romanshorn to Silla | 747.82 mi (1,203.50 km) |
| Romanshorn to Silleda | 918.34 mi (1,477.93 km) |
| Romanshorn to Sitges | 574.12 mi (923.95 km) |
| Romanshorn to Socuellamos | 833.78 mi (1,341.85 km) |
| Romanshorn to Soller | 632.61 mi (1,018.08 km) |
| Romanshorn to Solsona | 543.40 mi (874.51 km) |
| Romanshorn to Son Servera | 625.01 mi (1,005.85 km) |
| Romanshorn to Sonseca | 857.01 mi (1,379.22 km) |
| Romanshorn to Sopelana | 662.85 mi (1,066.75 km) |
| Romanshorn to Soria | 704.45 mi (1,133.71 km) |
| Romanshorn to Suances | 707.99 mi (1,139.40 km) |
