| Montemor-o-Novo to Oerlinghausen | 1,226.71 mi (1,974.21 km) |
| Montemor-o-Novo to Oestrich-Winkel | 1,116.81 mi (1,797.33 km) |
| Montemor-o-Novo to Offenburg | 1,051.63 mi (1,692.43 km) |
| Montemor-o-Novo to Oftersheim | 1,111.57 mi (1,788.90 km) |
| Montemor-o-Novo to Ohrdruf | 1,247.45 mi (2,007.57 km) |
| Montemor-o-Novo to Ohringen | 1,139.02 mi (1,833.07 km) |
| Montemor-o-Novo to Olbernhau | 1,337.28 mi (2,152.15 km) |
| Montemor-o-Novo to Olching | 1,176.25 mi (1,892.98 km) |
| Montemor-o-Novo to Oldenburg | 1,269.20 mi (2,042.58 km) |
| Montemor-o-Novo to Oldenburg in Holstein | 1,403.16 mi (2,258.17 km) |
| Montemor-o-Novo to Olfen | 1,174.87 mi (1,890.77 km) |
| Montemor-o-Novo to Olpe | 1,156.28 mi (1,860.86 km) |
| Montemor-o-Novo to Olsberg | 1,192.64 mi (1,919.36 km) |
| Montemor-o-Novo to Oranienburg | 1,411.53 mi (2,271.63 km) |
| Montemor-o-Novo to Ortenberg | 1,168.77 mi (1,880.96 km) |
