| Houten to Oberkirch | 273.92 mi (440.83 km) |
| Houten to Obernburg am Main | 229.97 mi (370.11 km) |
| Houten to Obernkirchen | 168.26 mi (270.79 km) |
| Houten to Oberschleissheim | 385.28 mi (620.05 km) |
| Houten to Oberstdorf | 392.48 mi (631.64 km) |
| Houten to Obertraubling | 373.33 mi (600.82 km) |
| Houten to Obertshausen | 209.30 mi (336.84 km) |
| Houten to Oberursel | 194.55 mi (313.09 km) |
| Houten to Ochsenfurt | 269.76 mi (434.13 km) |
| Houten to Ochsenhausen | 346.11 mi (557.00 km) |
| Houten to Ochtrup | 86.67 mi (139.48 km) |
| Houten to Odenthal | 108.61 mi (174.80 km) |
| Houten to Oelde | 127.83 mi (205.73 km) |
| Houten to Oelsnitz | 322.67 mi (519.29 km) |
| Houten to Oer-Erkenschwick | 92.98 mi (149.64 km) |
