| Sankt Augustin to Oerlinghausen | 104.46 mi (168.11 km) |
| Sankt Augustin to Oestrich-Winkel | 64.14 mi (103.23 km) |
| Sankt Augustin to Offenburg | 162.61 mi (261.70 km) |
| Sankt Augustin to Oftersheim | 114.85 mi (184.84 km) |
| Sankt Augustin to Ohrdruf | 154.89 mi (249.28 km) |
| Sankt Augustin to Ohringen | 149.41 mi (240.46 km) |
| Sankt Augustin to Olbernhau | 268.90 mi (432.76 km) |
| Sankt Augustin to Olching | 256.63 mi (413.01 km) |
| Sankt Augustin to Oldenburg | 169.75 mi (273.18 km) |
| Sankt Augustin to Oldenburg in Holstein | 289.09 mi (465.24 km) |
| Sankt Augustin to Olfen | 65.96 mi (106.15 km) |
| Sankt Augustin to Olpe | 32.93 mi (53.00 km) |
| Sankt Augustin to Olsberg | 69.11 mi (111.22 km) |
| Sankt Augustin to Oranienburg | 292.68 mi (471.02 km) |
| Sankt Augustin to Ortenberg | 86.86 mi (139.79 km) |
