| Wattwil to Oerlinghausen | 323.27 mi (520.25 km) |
| Wattwil to Oestrich-Winkel | 193.27 mi (311.04 km) |
| Wattwil to Offenburg | 96.87 mi (155.90 km) |
| Wattwil to Oftersheim | 145.18 mi (233.64 km) |
| Wattwil to Ohrdruf | 255.22 mi (410.74 km) |
| Wattwil to Ohringen | 132.97 mi (213.99 km) |
| Wattwil to Olbernhau | 302.21 mi (486.37 km) |
| Wattwil to Olching | 121.12 mi (194.93 km) |
| Wattwil to Oldenburg | 405.89 mi (653.21 km) |
| Wattwil to Oldenburg in Holstein | 490.25 mi (788.98 km) |
| Wattwil to Olfen | 314.81 mi (506.64 km) |
| Wattwil to Olpe | 263.21 mi (423.60 km) |
| Wattwil to Olsberg | 281.42 mi (452.90 km) |
| Wattwil to Oranienburg | 419.65 mi (675.36 km) |
| Wattwil to Ortenberg | 211.44 mi (340.27 km) |
