| Casier to Oberkirch | 281.04 mi (452.30 km) |
| Casier to Obernburg am Main | 324.50 mi (522.23 km) |
| Casier to Obernkirchen | 479.28 mi (771.33 km) |
| Casier to Oberschleissheim | 182.94 mi (294.41 km) |
| Casier to Oberstdorf | 154.94 mi (249.35 km) |
| Casier to Obertraubling | 229.18 mi (368.84 km) |
| Casier to Obertshausen | 344.80 mi (554.91 km) |
| Casier to Oberursel | 358.62 mi (577.14 km) |
| Casier to Ochsenfurt | 295.24 mi (475.14 km) |
| Casier to Ochsenhausen | 200.86 mi (323.26 km) |
| Casier to Ochtrup | 508.58 mi (818.48 km) |
| Casier to Odenthal | 441.35 mi (710.29 km) |
| Casier to Oelde | 467.01 mi (751.58 km) |
| Casier to Oelsnitz | 329.40 mi (530.13 km) |
| Casier to Oer-Erkenschwick | 473.59 mi (762.17 km) |
