| Portchester to Oberkirch | 440.86 mi (709.49 km) |
| Portchester to Obernburg am Main | 457.37 mi (736.07 km) |
| Portchester to Obernkirchen | 450.28 mi (724.66 km) |
| Portchester to Oberschleissheim | 595.40 mi (958.20 km) |
| Portchester to Oberstdorf | 566.56 mi (911.79 km) |
| Portchester to Obertraubling | 604.43 mi (972.74 km) |
| Portchester to Obertshausen | 440.78 mi (709.37 km) |
| Portchester to Oberursel | 427.93 mi (688.68 km) |
| Portchester to Ochsenfurt | 500.59 mi (805.62 km) |
| Portchester to Ochsenhausen | 532.01 mi (856.18 km) |
| Portchester to Ochtrup | 369.23 mi (594.23 km) |
| Portchester to Odenthal | 358.68 mi (577.25 km) |
| Portchester to Oelde | 405.67 mi (652.86 km) |
| Portchester to Oelsnitz | 582.29 mi (937.10 km) |
| Portchester to Oer-Erkenschwick | 366.06 mi (589.12 km) |
