| Iserlohn to Obernburg am Main | 124.70 mi (200.68 km) |
| Iserlohn to Obernkirchen | 86.96 mi (139.95 km) |
| Iserlohn to Oberschleissheim | 277.58 mi (446.73 km) |
| Iserlohn to Oberstdorf | 298.58 mi (480.51 km) |
| Iserlohn to Obertraubling | 259.83 mi (418.16 km) |
| Iserlohn to Obertshausen | 104.30 mi (167.85 km) |
| Iserlohn to Oberursel | 90.70 mi (145.97 km) |
| Iserlohn to Ochsenfurt | 159.54 mi (256.76 km) |
| Iserlohn to Ochsenhausen | 250.41 mi (402.99 km) |
| Iserlohn to Ochtrup | 60.35 mi (97.13 km) |
| Iserlohn to Odenthal | 33.94 mi (54.61 km) |
| Iserlohn to Oelde | 37.37 mi (60.15 km) |
| Iserlohn to Oelsnitz | 207.11 mi (333.31 km) |
| Iserlohn to Oer-Erkenschwick | 25.29 mi (40.71 km) |
| Iserlohn to Oerlinghausen | 58.83 mi (94.67 km) |
