| Olivares to Opwijk | 1,064.67 mi (1,713.41 km) |
| Olivares to Ostend | 1,052.31 mi (1,693.52 km) |
| Olivares to Oud-Heverlee | 1,068.49 mi (1,719.57 km) |
| Olivares to Oud-Turnhout | 1,103.87 mi (1,776.51 km) |
| Olivares to Oudenaarde | 1,044.44 mi (1,680.86 km) |
| Olivares to Oudenburg | 1,051.40 mi (1,692.06 km) |
| Olivares to Oupeye | 1,086.16 mi (1,748.01 km) |
| Olivares to Overijse | 1,062.38 mi (1,709.73 km) |
| Olivares to Overpelt | 1,108.80 mi (1,784.44 km) |
| Olivares to Paal | 1,092.69 mi (1,758.51 km) |
| Olivares to Peer | 1,104.99 mi (1,778.31 km) |
| Olivares to Pepinster | 1,082.97 mi (1,742.87 km) |
| Olivares to Peruwelz | 1,024.39 mi (1,648.60 km) |
| Olivares to Perwez | 1,060.23 mi (1,706.27 km) |
| Olivares to Philippeville | 1,029.52 mi (1,656.85 km) |
