| Birstonas to Opwijk | 862.85 mi (1,388.63 km) |
| Birstonas to Ostend | 905.76 mi (1,457.68 km) |
| Birstonas to Oud-Heverlee | 847.66 mi (1,364.18 km) |
| Birstonas to Oud-Turnhout | 821.33 mi (1,321.80 km) |
| Birstonas to Oudenaarde | 889.31 mi (1,431.20 km) |
| Birstonas to Oudenburg | 903.71 mi (1,454.38 km) |
| Birstonas to Oupeye | 813.06 mi (1,308.49 km) |
| Birstonas to Overijse | 854.41 mi (1,375.03 km) |
| Birstonas to Overpelt | 806.97 mi (1,298.70 km) |
| Birstonas to Paal | 821.67 mi (1,322.36 km) |
| Birstonas to Peer | 807.90 mi (1,300.19 km) |
| Birstonas to Pepinster | 810.67 mi (1,304.66 km) |
| Birstonas to Peruwelz | 899.89 mi (1,448.23 km) |
| Birstonas to Perwez | 848.13 mi (1,364.93 km) |
| Birstonas to Philippeville | 871.87 mi (1,403.14 km) |
