| Lake Ronkonkoma to Opwijk | 3,607.90 mi (5,806.35 km) |
| Lake Ronkonkoma to Ostend | 3,550.26 mi (5,713.59 km) |
| Lake Ronkonkoma to Oud-Heverlee | 3,630.87 mi (5,843.32 km) |
| Lake Ronkonkoma to Oud-Turnhout | 3,631.57 mi (5,844.45 km) |
| Lake Ronkonkoma to Oudenaarde | 3,587.01 mi (5,772.73 km) |
| Lake Ronkonkoma to Oudenburg | 3,554.54 mi (5,720.48 km) |
| Lake Ronkonkoma to Oupeye | 3,673.71 mi (5,912.26 km) |
| Lake Ronkonkoma to Overijse | 3,626.70 mi (5,836.61 km) |
| Lake Ronkonkoma to Overpelt | 3,651.54 mi (5,876.58 km) |
| Lake Ronkonkoma to Paal | 3,646.19 mi (5,867.98 km) |
| Lake Ronkonkoma to Peer | 3,655.15 mi (5,882.40 km) |
| Lake Ronkonkoma to Pepinster | 3,684.44 mi (5,929.53 km) |
| Lake Ronkonkoma to Peruwelz | 3,594.50 mi (5,784.79 km) |
| Lake Ronkonkoma to Perwez | 3,642.19 mi (5,861.54 km) |
| Lake Ronkonkoma to Philippeville | 3,642.15 mi (5,861.48 km) |
