| Harderwijk to Oberkirch | 285.13 mi (458.87 km) |
| Harderwijk to Obernburg am Main | 231.18 mi (372.04 km) |
| Harderwijk to Obernkirchen | 148.00 mi (238.18 km) |
| Harderwijk to Oberschleissheim | 386.02 mi (621.24 km) |
| Harderwijk to Oberstdorf | 399.32 mi (642.64 km) |
| Harderwijk to Obertraubling | 369.87 mi (595.26 km) |
| Harderwijk to Obertshausen | 210.37 mi (338.56 km) |
| Harderwijk to Oberursel | 195.85 mi (315.19 km) |
| Harderwijk to Ochsenfurt | 268.68 mi (432.41 km) |
| Harderwijk to Ochsenhausen | 352.05 mi (566.57 km) |
| Harderwijk to Ochtrup | 67.26 mi (108.25 km) |
| Harderwijk to Odenthal | 111.37 mi (179.23 km) |
| Harderwijk to Oelde | 113.30 mi (182.35 km) |
| Harderwijk to Oelsnitz | 312.29 mi (502.58 km) |
| Harderwijk to Oer-Erkenschwick | 84.99 mi (136.78 km) |
