| Prestwick to Oberkirch | 721.17 mi (1,160.62 km) |
| Prestwick to Obernburg am Main | 694.43 mi (1,117.57 km) |
| Prestwick to Obernkirchen | 600.87 mi (967.01 km) |
| Prestwick to Oberschleissheim | 849.35 mi (1,366.89 km) |
| Prestwick to Oberstdorf | 847.35 mi (1,363.68 km) |
| Prestwick to Obertraubling | 838.06 mi (1,348.72 km) |
| Prestwick to Obertshausen | 673.91 mi (1,084.55 km) |
| Prestwick to Oberursel | 659.15 mi (1,060.79 km) |
| Prestwick to Ochsenfurt | 734.74 mi (1,182.45 km) |
| Prestwick to Ochsenhausen | 803.77 mi (1,293.55 km) |
| Prestwick to Ochtrup | 531.22 mi (854.92 km) |
| Prestwick to Odenthal | 573.41 mi (922.81 km) |
| Prestwick to Oelde | 579.44 mi (932.51 km) |
| Prestwick to Oelsnitz | 778.97 mi (1,253.63 km) |
| Prestwick to Oer-Erkenschwick | 553.87 mi (891.36 km) |
