| Sliema to Oberkirch | 931.02 mi (1,498.34 km) |
| Sliema to Obernburg am Main | 999.23 mi (1,608.10 km) |
| Sliema to Obernkirchen | 1,160.34 mi (1,867.39 km) |
| Sliema to Oberschleissheim | 865.49 mi (1,392.87 km) |
| Sliema to Oberstdorf | 823.46 mi (1,325.23 km) |
| Sliema to Obertraubling | 909.64 mi (1,463.92 km) |
| Sliema to Obertshausen | 1,018.36 mi (1,638.88 km) |
| Sliema to Oberursel | 1,030.93 mi (1,659.12 km) |
| Sliema to Ochsenfurt | 975.05 mi (1,569.19 km) |
| Sliema to Ochsenhausen | 871.73 mi (1,402.91 km) |
| Sliema to Ochtrup | 1,181.41 mi (1,901.30 km) |
| Sliema to Odenthal | 1,107.11 mi (1,781.73 km) |
| Sliema to Oelde | 1,143.58 mi (1,840.41 km) |
| Sliema to Oelsnitz | 1,008.93 mi (1,623.71 km) |
| Sliema to Oer-Erkenschwick | 1,144.10 mi (1,841.25 km) |
