| Quarteira to Oberkirch | 1,136.06 mi (1,828.32 km) |
| Quarteira to Obernburg am Main | 1,229.85 mi (1,979.26 km) |
| Quarteira to Obernkirchen | 1,341.42 mi (2,158.81 km) |
| Quarteira to Oberschleissheim | 1,256.93 mi (2,022.84 km) |
| Quarteira to Oberstdorf | 1,175.94 mi (1,892.50 km) |
| Quarteira to Obertraubling | 1,305.93 mi (2,101.69 km) |
| Quarteira to Obertshausen | 1,229.39 mi (1,978.51 km) |
| Quarteira to Oberursel | 1,226.99 mi (1,974.65 km) |
| Quarteira to Ochsenfurt | 1,254.23 mi (2,018.49 km) |
| Quarteira to Ochsenhausen | 1,187.11 mi (1,910.47 km) |
| Quarteira to Ochtrup | 1,282.38 mi (2,063.79 km) |
| Quarteira to Odenthal | 1,220.53 mi (1,964.26 km) |
| Quarteira to Oelde | 1,291.22 mi (2,078.02 km) |
| Quarteira to Oelsnitz | 1,360.78 mi (2,189.96 km) |
| Quarteira to Oer-Erkenschwick | 1,255.19 mi (2,020.03 km) |
