| Neunkirchen to Opwijk | 172.94 mi (278.33 km) |
| Neunkirchen to Ostend | 227.88 mi (366.73 km) |
| Neunkirchen to Oud-Heverlee | 150.93 mi (242.90 km) |
| Neunkirchen to Oud-Turnhout | 166.53 mi (268.00 km) |
| Neunkirchen to Oudenaarde | 188.99 mi (304.15 km) |
| Neunkirchen to Oudenburg | 223.35 mi (359.45 km) |
| Neunkirchen to Oupeye | 115.67 mi (186.15 km) |
| Neunkirchen to Overijse | 153.11 mi (246.41 km) |
| Neunkirchen to Overpelt | 150.34 mi (241.94 km) |
| Neunkirchen to Paal | 146.28 mi (235.41 km) |
| Neunkirchen to Peer | 144.57 mi (232.67 km) |
| Neunkirchen to Pepinster | 103.28 mi (166.22 km) |
| Neunkirchen to Peruwelz | 178.57 mi (287.38 km) |
| Neunkirchen to Perwez | 136.60 mi (219.84 km) |
| Neunkirchen to Philippeville | 130.69 mi (210.32 km) |
