| Rio Maior to Opwijk | 1,023.73 mi (1,647.53 km) |
| Rio Maior to Ostend | 1,000.89 mi (1,610.78 km) |
| Rio Maior to Oud-Heverlee | 1,031.78 mi (1,660.48 km) |
| Rio Maior to Oud-Turnhout | 1,065.20 mi (1,714.27 km) |
| Rio Maior to Oudenaarde | 1,000.56 mi (1,610.24 km) |
| Rio Maior to Oudenburg | 1,000.85 mi (1,610.72 km) |
| Rio Maior to Oupeye | 1,056.61 mi (1,700.46 km) |
| Rio Maior to Overijse | 1,025.22 mi (1,649.93 km) |
| Rio Maior to Overpelt | 1,073.58 mi (1,727.75 km) |
| Rio Maior to Paal | 1,057.44 mi (1,701.79 km) |
| Rio Maior to Peer | 1,070.69 mi (1,723.10 km) |
| Rio Maior to Pepinster | 1,055.71 mi (1,699.01 km) |
| Rio Maior to Peruwelz | 983.10 mi (1,582.15 km) |
| Rio Maior to Perwez | 1,026.23 mi (1,651.56 km) |
| Rio Maior to Philippeville | 997.50 mi (1,605.32 km) |
