| Lake Norman of Catawba to Opwijk | 4,166.98 mi (6,706.10 km) |
| Lake Norman of Catawba to Ostend | 4,109.34 mi (6,613.35 km) |
| Lake Norman of Catawba to Oud-Heverlee | 4,189.95 mi (6,743.07 km) |
| Lake Norman of Catawba to Oud-Turnhout | 4,190.49 mi (6,743.95 km) |
| Lake Norman of Catawba to Oudenaarde | 4,146.14 mi (6,672.56 km) |
| Lake Norman of Catawba to Oudenburg | 4,113.63 mi (6,620.25 km) |
| Lake Norman of Catawba to Oupeye | 4,232.76 mi (6,811.97 km) |
| Lake Norman of Catawba to Overijse | 4,185.80 mi (6,736.39 km) |
| Lake Norman of Catawba to Overpelt | 4,210.46 mi (6,776.08 km) |
| Lake Norman of Catawba to Paal | 4,205.19 mi (6,767.59 km) |
| Lake Norman of Catawba to Peer | 4,214.10 mi (6,781.93 km) |
| Lake Norman of Catawba to Pepinster | 4,243.51 mi (6,829.27 km) |
| Lake Norman of Catawba to Peruwelz | 4,153.67 mi (6,684.69 km) |
| Lake Norman of Catawba to Perwez | 4,201.31 mi (6,761.35 km) |
| Lake Norman of Catawba to Philippeville | 4,201.33 mi (6,761.39 km) |
