| Knokke-Heist to Oswego (Illinois) | 4,117.77 mi (6,626.91 km) |
| Knokke-Heist to Oswego (New York) | 3,583.86 mi (5,767.67 km) |
| Knokke-Heist to Otsego (Minnesota) | 4,137.13 mi (6,658.06 km) |
| Knokke-Heist to Ottawa (Illinois) | 4,151.71 mi (6,681.53 km) |
| Knokke-Heist to Ottawa (Kansas) | 4,526.08 mi (7,284.02 km) |
| Knokke-Heist to Ottumwa (Iowa) | 4,300.90 mi (6,921.63 km) |
| Knokke-Heist to Overland (Missouri) | 4,338.97 mi (6,982.90 km) |
| Knokke-Heist to Overland Park (Kansas) | 4,490.38 mi (7,226.57 km) |
| Knokke-Heist to Overlea (Maryland) | 3,765.31 mi (6,059.67 km) |
| Knokke-Heist to Oviedo (Florida) | 4,470.68 mi (7,194.86 km) |
| Knokke-Heist to Owasso (Oklahoma) | 4,665.16 mi (7,507.85 km) |
| Knokke-Heist to Owatonna (Minnesota) | 4,180.21 mi (6,727.40 km) |
| Knokke-Heist to Owensboro (Kentucky) | 4,260.45 mi (6,856.54 km) |
| Knokke-Heist to Owings Mills (Maryland) | 3,774.20 mi (6,073.99 km) |
| Knokke-Heist to Owosso (Michigan) | 3,899.96 mi (6,276.37 km) |
