| Sankt Augustin to Oberkirch | 159.66 mi (256.94 km) |
| Sankt Augustin to Obernburg am Main | 107.56 mi (173.10 km) |
| Sankt Augustin to Obernkirchen | 132.59 mi (213.39 km) |
| Sankt Augustin to Oberschleissheim | 262.46 mi (422.39 km) |
| Sankt Augustin to Oberstdorf | 271.02 mi (436.17 km) |
| Sankt Augustin to Obertraubling | 254.34 mi (409.33 km) |
| Sankt Augustin to Obertshausen | 87.27 mi (140.44 km) |
| Sankt Augustin to Oberursel | 72.58 mi (116.81 km) |
| Sankt Augustin to Ochsenfurt | 149.00 mi (239.79 km) |
| Sankt Augustin to Ochsenhausen | 223.90 mi (360.34 km) |
| Sankt Augustin to Ochtrup | 99.19 mi (159.63 km) |
| Sankt Augustin to Odenthal | 18.45 mi (29.69 km) |
| Sankt Augustin to Oelde | 84.43 mi (135.88 km) |
| Sankt Augustin to Oelsnitz | 219.75 mi (353.65 km) |
| Sankt Augustin to Oer-Erkenschwick | 60.33 mi (97.09 km) |
