| Ptolemaida to Oerlinghausen | 1,003.19 mi (1,614.48 km) |
| Ptolemaida to Oestrich-Winkel | 931.15 mi (1,498.54 km) |
| Ptolemaida to Offenburg | 870.09 mi (1,400.27 km) |
| Ptolemaida to Oftersheim | 883.41 mi (1,421.72 km) |
| Ptolemaida to Ohrdruf | 885.17 mi (1,424.54 km) |
| Ptolemaida to Ohringen | 844.17 mi (1,358.56 km) |
| Ptolemaida to Olbernhau | 808.02 mi (1,300.38 km) |
| Ptolemaida to Olching | 736.35 mi (1,185.04 km) |
| Ptolemaida to Oldenburg | 1,076.26 mi (1,732.07 km) |
| Ptolemaida to Oldenburg in Holstein | 1,075.15 mi (1,730.29 km) |
| Ptolemaida to Olfen | 1,029.71 mi (1,657.16 km) |
| Ptolemaida to Olpe | 982.66 mi (1,581.44 km) |
| Ptolemaida to Olsberg | 978.09 mi (1,574.08 km) |
| Ptolemaida to Oranienburg | 934.18 mi (1,503.42 km) |
| Ptolemaida to Ortenberg | 912.38 mi (1,468.34 km) |
