| Lake Norman of Catawba to Nuth | 4,237.01 mi (6,818.82 km) |
| Lake Norman of Catawba to Oegstgeest | 4,148.34 mi (6,676.10 km) |
| Lake Norman of Catawba to Oirschot | 4,198.54 mi (6,756.90 km) |
| Lake Norman of Catawba to Oisterwijk | 4,192.43 mi (6,747.06 km) |
| Lake Norman of Catawba to Oldebroek | 4,198.19 mi (6,756.33 km) |
| Lake Norman of Catawba to Oldenzaal | 4,242.06 mi (6,826.94 km) |
| Lake Norman of Catawba to Ommen | 4,216.70 mi (6,786.12 km) |
| Lake Norman of Catawba to Oosterend | 4,190.71 mi (6,744.30 km) |
| Lake Norman of Catawba to Oosterhout | 4,177.22 mi (6,722.58 km) |
| Lake Norman of Catawba to Oosterwolde | 4,199.76 mi (6,758.86 km) |
| Lake Norman of Catawba to Oostzaan | 4,158.67 mi (6,692.74 km) |
| Lake Norman of Catawba to Opmeer | 4,154.76 mi (6,686.43 km) |
| Lake Norman of Catawba to Oss | 4,200.40 mi (6,759.89 km) |
| Lake Norman of Catawba to Oud-Beijerland | 4,154.66 mi (6,686.28 km) |
| Lake Norman of Catawba to Oudenbosch | 4,165.23 mi (6,703.29 km) |
