| Mountain Top to Opwijk | 3,707.21 mi (5,966.17 km) |
| Mountain Top to Ostend | 3,649.68 mi (5,873.60 km) |
| Mountain Top to Oud-Heverlee | 3,730.20 mi (6,003.17 km) |
| Mountain Top to Oud-Turnhout | 3,729.66 mi (6,002.30 km) |
| Mountain Top to Oudenaarde | 3,686.90 mi (5,933.49 km) |
| Mountain Top to Oudenburg | 3,654.02 mi (5,880.58 km) |
| Mountain Top to Oupeye | 3,772.75 mi (6,071.65 km) |
| Mountain Top to Overijse | 3,726.21 mi (5,996.76 km) |
| Mountain Top to Overpelt | 3,749.60 mi (6,034.40 km) |
| Mountain Top to Paal | 3,744.78 mi (6,026.64 km) |
| Mountain Top to Peer | 3,753.38 mi (6,040.48 km) |
| Mountain Top to Pepinster | 3,783.68 mi (6,089.25 km) |
| Mountain Top to Peruwelz | 3,695.13 mi (5,946.74 km) |
| Mountain Top to Perwez | 3,741.89 mi (6,021.99 km) |
| Mountain Top to Philippeville | 3,742.92 mi (6,023.64 km) |
