| Amadora to Oberkirch | 1,094.91 mi (1,762.09 km) |
| Amadora to Obernburg am Main | 1,183.82 mi (1,905.17 km) |
| Amadora to Obernkirchen | 1,282.79 mi (2,064.45 km) |
| Amadora to Oberschleissheim | 1,226.56 mi (1,973.96 km) |
| Amadora to Oberstdorf | 1,148.13 mi (1,847.73 km) |
| Amadora to Obertraubling | 1,272.44 mi (2,047.79 km) |
| Amadora to Obertshausen | 1,181.23 mi (1,901.00 km) |
| Amadora to Oberursel | 1,177.35 mi (1,894.76 km) |
| Amadora to Ochsenfurt | 1,211.73 mi (1,950.08 km) |
| Amadora to Ochsenhausen | 1,154.05 mi (1,857.27 km) |
| Amadora to Ochtrup | 1,218.83 mi (1,961.52 km) |
| Amadora to Odenthal | 1,162.30 mi (1,870.55 km) |
| Amadora to Oelde | 1,232.06 mi (1,982.80 km) |
| Amadora to Oelsnitz | 1,318.92 mi (2,122.59 km) |
| Amadora to Oer-Erkenschwick | 1,194.39 mi (1,922.19 km) |
