| Sidney to Opwijk | 4,071.45 mi (6,552.36 km) |
| Sidney to Ostend | 4,014.40 mi (6,460.55 km) |
| Sidney to Oud-Heverlee | 4,094.39 mi (6,589.29 km) |
| Sidney to Oud-Turnhout | 4,091.21 mi (6,584.16 km) |
| Sidney to Oudenaarde | 4,052.45 mi (6,521.79 km) |
| Sidney to Oudenburg | 4,018.83 mi (6,467.68 km) |
| Sidney to Oupeye | 4,136.16 mi (6,656.51 km) |
| Sidney to Overijse | 4,090.82 mi (6,583.53 km) |
| Sidney to Overpelt | 4,111.01 mi (6,616.04 km) |
| Sidney to Paal | 4,107.35 mi (6,610.13 km) |
| Sidney to Peer | 4,115.13 mi (6,622.66 km) |
| Sidney to Pepinster | 4,147.49 mi (6,674.74 km) |
| Sidney to Peruwelz | 4,062.22 mi (6,537.50 km) |
| Sidney to Perwez | 4,106.83 mi (6,609.31 km) |
| Sidney to Philippeville | 4,110.12 mi (6,614.59 km) |
