| Alliance to Opwijk | 3,923.95 mi (6,314.99 km) |
| Alliance to Ostend | 3,866.73 mi (6,222.90 km) |
| Alliance to Oud-Heverlee | 3,946.93 mi (6,351.96 km) |
| Alliance to Oud-Turnhout | 3,944.55 mi (6,348.14 km) |
| Alliance to Oudenaarde | 3,904.54 mi (6,283.75 km) |
| Alliance to Oudenburg | 3,871.13 mi (6,229.98 km) |
| Alliance to Oupeye | 3,988.96 mi (6,419.61 km) |
| Alliance to Overijse | 3,943.22 mi (6,346.00 km) |
| Alliance to Overpelt | 3,964.41 mi (6,380.11 km) |
| Alliance to Paal | 3,960.39 mi (6,373.63 km) |
| Alliance to Peer | 3,968.43 mi (6,386.56 km) |
| Alliance to Pepinster | 4,000.17 mi (6,437.66 km) |
| Alliance to Peruwelz | 3,913.85 mi (6,298.73 km) |
| Alliance to Perwez | 3,959.14 mi (6,371.62 km) |
| Alliance to Philippeville | 3,961.74 mi (6,375.80 km) |
