| Marlow to Oberkirch | 445.27 mi (716.60 km) |
| Marlow to Obernburg am Main | 449.89 mi (724.03 km) |
| Marlow to Obernkirchen | 424.20 mi (682.68 km) |
| Marlow to Oberschleissheim | 594.39 mi (956.58 km) |
| Marlow to Oberstdorf | 572.71 mi (921.69 km) |
| Marlow to Obertraubling | 598.50 mi (963.19 km) |
| Marlow to Obertshausen | 431.95 mi (695.16 km) |
| Marlow to Oberursel | 418.32 mi (673.22 km) |
| Marlow to Ochsenfurt | 493.22 mi (793.76 km) |
| Marlow to Ochsenhausen | 535.12 mi (861.19 km) |
| Marlow to Ochtrup | 342.54 mi (551.26 km) |
| Marlow to Odenthal | 342.96 mi (551.95 km) |
| Marlow to Oelde | 382.58 mi (615.71 km) |
| Marlow to Oelsnitz | 567.87 mi (913.90 km) |
| Marlow to Oer-Erkenschwick | 344.48 mi (554.38 km) |
