| Ptolemaida to Oberkirch | 867.01 mi (1,395.32 km) |
| Ptolemaida to Obernburg am Main | 885.44 mi (1,424.99 km) |
| Ptolemaida to Obernkirchen | 1,005.71 mi (1,618.54 km) |
| Ptolemaida to Oberschleissheim | 730.25 mi (1,175.22 km) |
| Ptolemaida to Oberstdorf | 739.26 mi (1,189.72 km) |
| Ptolemaida to Obertraubling | 746.39 mi (1,201.20 km) |
| Ptolemaida to Obertshausen | 906.10 mi (1,458.22 km) |
| Ptolemaida to Oberursel | 920.85 mi (1,481.97 km) |
| Ptolemaida to Ochsenfurt | 846.23 mi (1,361.88 km) |
| Ptolemaida to Ochsenhausen | 779.02 mi (1,253.71 km) |
| Ptolemaida to Ochtrup | 1,058.94 mi (1,704.19 km) |
| Ptolemaida to Odenthal | 1,006.79 mi (1,620.27 km) |
| Ptolemaida to Oelde | 1,011.82 mi (1,628.37 km) |
| Ptolemaida to Oelsnitz | 823.48 mi (1,325.26 km) |
| Ptolemaida to Oer-Erkenschwick | 1,030.37 mi (1,658.22 km) |
