| Gunbarrel to Oberkirch | 5,085.81 mi (8,184.83 km) |
| Gunbarrel to Obernburg am Main | 5,059.10 mi (8,141.83 km) |
| Gunbarrel to Obernkirchen | 4,944.10 mi (7,956.76 km) |
| Gunbarrel to Oberschleissheim | 5,214.41 mi (8,391.78 km) |
| Gunbarrel to Oberstdorf | 5,212.89 mi (8,389.33 km) |
| Gunbarrel to Obertraubling | 5,198.63 mi (8,366.39 km) |
| Gunbarrel to Obertshausen | 5,038.39 mi (8,108.51 km) |
| Gunbarrel to Oberursel | 5,023.65 mi (8,084.78 km) |
| Gunbarrel to Ochsenfurt | 5,098.08 mi (8,204.57 km) |
| Gunbarrel to Ochsenhausen | 5,169.92 mi (8,320.18 km) |
| Gunbarrel to Ochtrup | 4,886.35 mi (7,863.81 km) |
| Gunbarrel to Odenthal | 4,937.71 mi (7,946.48 km) |
| Gunbarrel to Oelde | 4,933.91 mi (7,940.37 km) |
| Gunbarrel to Oelsnitz | 5,127.51 mi (8,251.93 km) |
| Gunbarrel to Oer-Erkenschwick | 4,914.08 mi (7,908.45 km) |
