| Montemor-o-Novo to Oberkirch | 1,059.90 mi (1,705.74 km) |
| Montemor-o-Novo to Obernburg am Main | 1,150.70 mi (1,851.88 km) |
| Montemor-o-Novo to Obernkirchen | 1,254.78 mi (2,019.38 km) |
| Montemor-o-Novo to Oberschleissheim | 1,188.08 mi (1,912.03 km) |
| Montemor-o-Novo to Oberstdorf | 1,108.74 mi (1,784.34 km) |
| Montemor-o-Novo to Obertraubling | 1,235.02 mi (1,987.57 km) |
| Montemor-o-Novo to Obertshausen | 1,148.91 mi (1,848.99 km) |
| Montemor-o-Novo to Oberursel | 1,145.60 mi (1,843.66 km) |
| Montemor-o-Novo to Ochsenfurt | 1,177.35 mi (1,894.76 km) |
| Montemor-o-Novo to Ochsenhausen | 1,116.35 mi (1,796.59 km) |
| Montemor-o-Novo to Ochtrup | 1,192.88 mi (1,919.76 km) |
| Montemor-o-Novo to Odenthal | 1,134.00 mi (1,824.99 km) |
| Montemor-o-Novo to Oelde | 1,204.22 mi (1,938.01 km) |
| Montemor-o-Novo to Oelsnitz | 1,284.43 mi (2,067.09 km) |
| Montemor-o-Novo to Oer-Erkenschwick | 1,167.21 mi (1,878.45 km) |
