| Seini to Oberkirch | 701.84 mi (1,129.50 km) |
| Seini to Obernburg am Main | 658.74 mi (1,060.13 km) |
| Seini to Obernkirchen | 700.71 mi (1,127.69 km) |
| Seini to Oberschleissheim | 542.37 mi (872.86 km) |
| Seini to Oberstdorf | 605.93 mi (975.16 km) |
| Seini to Obertraubling | 516.87 mi (831.82 km) |
| Seini to Obertshausen | 674.41 mi (1,085.36 km) |
| Seini to Oberursel | 687.03 mi (1,105.66 km) |
| Seini to Ochsenfurt | 616.09 mi (991.51 km) |
| Seini to Ochsenhausen | 617.32 mi (993.48 km) |
| Seini to Ochtrup | 776.53 mi (1,249.70 km) |
| Seini to Odenthal | 759.94 mi (1,223.01 km) |
| Seini to Oelde | 730.01 mi (1,174.84 km) |
| Seini to Oelsnitz | 535.25 mi (861.41 km) |
| Seini to Oer-Erkenschwick | 763.54 mi (1,228.80 km) |
