| Nieuwpoort to Oswego (Illinois) | 4,105.39 mi (6,606.99 km) |
| Nieuwpoort to Oswego (New York) | 3,569.23 mi (5,744.12 km) |
| Nieuwpoort to Otsego (Minnesota) | 4,127.47 mi (6,642.52 km) |
| Nieuwpoort to Ottawa (Illinois) | 4,139.34 mi (6,661.62 km) |
| Nieuwpoort to Ottawa (Kansas) | 4,514.49 mi (7,265.37 km) |
| Nieuwpoort to Ottumwa (Iowa) | 4,289.36 mi (6,903.06 km) |
| Nieuwpoort to Overland (Missouri) | 4,326.07 mi (6,962.14 km) |
| Nieuwpoort to Overland Park (Kansas) | 4,478.73 mi (7,207.82 km) |
| Nieuwpoort to Overlea (Maryland) | 3,749.07 mi (6,033.55 km) |
| Nieuwpoort to Oviedo (Florida) | 4,452.19 mi (7,165.12 km) |
| Nieuwpoort to Owasso (Oklahoma) | 4,652.98 mi (7,488.25 km) |
| Nieuwpoort to Owatonna (Minnesota) | 4,170.01 mi (6,710.98 km) |
| Nieuwpoort to Owensboro (Kentucky) | 4,246.36 mi (6,833.86 km) |
| Nieuwpoort to Owings Mills (Maryland) | 3,758.05 mi (6,048.00 km) |
| Nieuwpoort to Owosso (Michigan) | 3,887.01 mi (6,255.55 km) |
