| Cities | Distance |
|---|---|
| Marl to Obernburg am Main | 154.14 mi (248.06 km) |
| Marl to Obernkirchen | 94.72 mi (152.44 km) |
| Marl to Oberschleissheim | 307.87 mi (495.47 km) |
| Marl to Oberstdorf | 326.45 mi (525.37 km) |
| Marl to Obertraubling | 290.52 mi (467.55 km) |
| Marl to Obertshausen | 133.50 mi (214.85 km) |
| Marl to Oberursel | 119.43 mi (192.21 km) |
| Marl to Ochsenfurt | 190.00 mi (305.78 km) |
| Marl to Ochsenhausen | 278.48 mi (448.17 km) |
| Marl to Ochtrup | 37.37 mi (60.13 km) |
| Marl to Odenthal | 43.76 mi (70.43 km) |
| Marl to Oelde | 45.67 mi (73.50 km) |
| Marl to Oelsnitz | 235.71 mi (379.34 km) |
| Marl to Oer-Erkenschwick | 5.99 mi (9.64 km) |
| Marl to Oerlinghausen | 69.37 mi (111.64 km) |