| Romanshorn to Nyon | 168.29 mi (270.84 km) |
| Romanshorn to Oberriet | 19.69 mi (31.69 km) |
| Romanshorn to Obersiggenthal | 49.94 mi (80.37 km) |
| Romanshorn to Oberwil | 84.11 mi (135.37 km) |
| Romanshorn to Oberwingert | 27.59 mi (44.39 km) |
| Romanshorn to Oftringen | 69.41 mi (111.70 km) |
| Romanshorn to Olten | 69.62 mi (112.04 km) |
| Romanshorn to Onex | 180.95 mi (291.21 km) |
| Romanshorn to Opfikon | 37.94 mi (61.07 km) |
| Romanshorn to Ostermundigen | 97.12 mi (156.29 km) |
| Romanshorn to Payerne | 124.92 mi (201.04 km) |
| Romanshorn to Pfaffikon | 30.02 mi (48.32 km) |
| Romanshorn to Plan-les-Ouates | 180.91 mi (291.15 km) |
| Romanshorn to Pratteln | 77.33 mi (124.44 km) |
| Romanshorn to Prilly | 148.00 mi (238.18 km) |
