| Lake Monticello to Opwijk | 3,950.18 mi (6,357.19 km) |
| Lake Monticello to Ostend | 3,892.56 mi (6,264.47 km) |
| Lake Monticello to Oud-Heverlee | 3,973.15 mi (6,394.17 km) |
| Lake Monticello to Oud-Turnhout | 3,973.52 mi (6,394.77 km) |
| Lake Monticello to Oudenaarde | 3,929.43 mi (6,323.80 km) |
| Lake Monticello to Oudenburg | 3,896.86 mi (6,271.38 km) |
| Lake Monticello to Oupeye | 4,015.92 mi (6,463.00 km) |
| Lake Monticello to Overijse | 3,969.03 mi (6,387.53 km) |
| Lake Monticello to Overpelt | 3,993.48 mi (6,426.89 km) |
| Lake Monticello to Paal | 3,988.28 mi (6,418.52 km) |
| Lake Monticello to Peer | 3,997.15 mi (6,432.79 km) |
| Lake Monticello to Pepinster | 4,026.71 mi (6,480.36 km) |
| Lake Monticello to Peruwelz | 3,937.09 mi (6,336.13 km) |
| Lake Monticello to Perwez | 3,984.57 mi (6,412.55 km) |
| Lake Monticello to Philippeville | 3,984.77 mi (6,412.87 km) |
