| Prestonpans to Oberkirch | 692.33 mi (1,114.19 km) |
| Prestonpans to Obernburg am Main | 656.58 mi (1,056.66 km) |
| Prestonpans to Obernkirchen | 550.73 mi (886.32 km) |
| Prestonpans to Oberschleissheim | 811.90 mi (1,306.63 km) |
| Prestonpans to Oberstdorf | 816.28 mi (1,313.68 km) |
| Prestonpans to Obertraubling | 796.58 mi (1,281.96 km) |
| Prestonpans to Obertshausen | 635.83 mi (1,023.27 km) |
| Prestonpans to Oberursel | 621.11 mi (999.58 km) |
| Prestonpans to Ochsenfurt | 695.34 mi (1,119.04 km) |
| Prestonpans to Ochsenhausen | 771.18 mi (1,241.09 km) |
| Prestonpans to Ochtrup | 485.66 mi (781.60 km) |
| Prestonpans to Odenthal | 535.22 mi (861.35 km) |
| Prestonpans to Oelde | 533.77 mi (859.02 km) |
| Prestonpans to Oelsnitz | 731.78 mi (1,177.69 km) |
| Prestonpans to Oer-Erkenschwick | 511.65 mi (823.43 km) |
