| Osuna to Opwijk | 1,052.82 mi (1,694.35 km) |
| Osuna to Ostend | 1,043.63 mi (1,679.56 km) |
| Osuna to Oud-Heverlee | 1,055.39 mi (1,698.49 km) |
| Osuna to Oud-Turnhout | 1,091.12 mi (1,755.98 km) |
| Osuna to Oudenaarde | 1,033.60 mi (1,663.42 km) |
| Osuna to Oudenburg | 1,042.47 mi (1,677.70 km) |
| Osuna to Oupeye | 1,070.88 mi (1,723.42 km) |
| Osuna to Overijse | 1,049.45 mi (1,688.92 km) |
| Osuna to Overpelt | 1,095.01 mi (1,762.24 km) |
| Osuna to Paal | 1,079.00 mi (1,736.49 km) |
| Osuna to Peer | 1,090.96 mi (1,755.73 km) |
| Osuna to Pepinster | 1,067.05 mi (1,717.25 km) |
| Osuna to Peruwelz | 1,012.94 mi (1,630.17 km) |
| Osuna to Perwez | 1,046.40 mi (1,684.02 km) |
| Osuna to Philippeville | 1,015.34 mi (1,634.02 km) |
