| Alenquer to Oberkirch | 1,071.39 mi (1,724.24 km) |
| Alenquer to Obernburg am Main | 1,159.97 mi (1,866.79 km) |
| Alenquer to Obernkirchen | 1,258.33 mi (2,025.09 km) |
| Alenquer to Oberschleissheim | 1,203.76 mi (1,937.27 km) |
| Alenquer to Oberstdorf | 1,125.57 mi (1,811.44 km) |
| Alenquer to Obertraubling | 1,249.38 mi (2,010.69 km) |
| Alenquer to Obertshausen | 1,157.26 mi (1,862.43 km) |
| Alenquer to Oberursel | 1,153.31 mi (1,856.07 km) |
| Alenquer to Ochsenfurt | 1,188.08 mi (1,912.03 km) |
| Alenquer to Ochsenhausen | 1,131.08 mi (1,820.30 km) |
| Alenquer to Ochtrup | 1,194.23 mi (1,921.93 km) |
| Alenquer to Odenthal | 1,137.88 mi (1,831.24 km) |
| Alenquer to Oelde | 1,207.59 mi (1,943.42 km) |
| Alenquer to Oelsnitz | 1,295.27 mi (2,084.54 km) |
| Alenquer to Oer-Erkenschwick | 1,169.88 mi (1,882.73 km) |
