| National City to Opwijk | 5,646.48 mi (9,087.13 km) |
| National City to Ostend | 5,594.12 mi (9,002.86 km) |
| National City to Oud-Heverlee | 5,668.10 mi (9,121.92 km) |
| National City to Oud-Turnhout | 5,654.89 mi (9,100.67 km) |
| National City to Oudenaarde | 5,633.46 mi (9,066.17 km) |
| National City to Oudenburg | 5,598.67 mi (9,010.19 km) |
| National City to Oupeye | 5,704.75 mi (9,180.92 km) |
| National City to Overijse | 5,666.27 mi (9,118.98 km) |
| National City to Overpelt | 5,673.16 mi (9,130.07 km) |
| National City to Paal | 5,674.11 mi (9,131.60 km) |
| National City to Peer | 5,678.35 mi (9,138.42 km) |
| National City to Pepinster | 5,717.04 mi (9,200.68 km) |
| National City to Peruwelz | 5,648.62 mi (9,090.57 km) |
| National City to Perwez | 5,682.78 mi (9,145.55 km) |
| National City to Philippeville | 5,694.63 mi (9,164.62 km) |
