| Straelen to Oberkirch | 217.06 mi (349.33 km) |
| Straelen to Obernburg am Main | 168.02 mi (270.40 km) |
| Straelen to Obernkirchen | 134.09 mi (215.80 km) |
| Straelen to Oberschleissheim | 323.32 mi (520.34 km) |
| Straelen to Oberstdorf | 332.21 mi (534.64 km) |
| Straelen to Obertraubling | 312.16 mi (502.37 km) |
| Straelen to Obertshausen | 147.36 mi (237.15 km) |
| Straelen to Oberursel | 132.60 mi (213.40 km) |
| Straelen to Ochsenfurt | 208.04 mi (334.81 km) |
| Straelen to Ochsenhausen | 285.34 mi (459.21 km) |
| Straelen to Ochtrup | 65.43 mi (105.30 km) |
| Straelen to Odenthal | 46.70 mi (75.15 km) |
| Straelen to Oelde | 84.98 mi (136.76 km) |
| Straelen to Oelsnitz | 266.56 mi (428.99 km) |
| Straelen to Oer-Erkenschwick | 44.32 mi (71.33 km) |
