| Horgen to Oberkirch | 90.73 mi (146.01 km) |
| Horgen to Obernburg am Main | 179.51 mi (288.90 km) |
| Horgen to Obernkirchen | 346.22 mi (557.18 km) |
| Horgen to Oberschleissheim | 153.62 mi (247.23 km) |
| Horgen to Oberstdorf | 79.24 mi (127.53 km) |
| Horgen to Obertraubling | 202.09 mi (325.23 km) |
| Horgen to Obertshausen | 193.75 mi (311.82 km) |
| Horgen to Oberursel | 202.90 mi (326.54 km) |
| Horgen to Ochsenfurt | 177.85 mi (286.22 km) |
| Horgen to Ochsenhausen | 83.85 mi (134.95 km) |
| Horgen to Ochtrup | 346.98 mi (558.42 km) |
| Horgen to Odenthal | 268.73 mi (432.47 km) |
| Horgen to Oelde | 316.16 mi (508.82 km) |
| Horgen to Oelsnitz | 271.36 mi (436.71 km) |
| Horgen to Oer-Erkenschwick | 308.32 mi (496.19 km) |
