| Oostakker to Oswego (Illinois) | 4,144.11 mi (6,669.30 km) |
| Oostakker to Oswego (New York) | 3,609.72 mi (5,809.29 km) |
| Oostakker to Otsego (Minnesota) | 4,163.74 mi (6,700.88 km) |
| Oostakker to Ottawa (Illinois) | 4,178.05 mi (6,723.92 km) |
| Oostakker to Ottawa (Kansas) | 4,552.53 mi (7,326.59 km) |
| Oostakker to Ottumwa (Iowa) | 4,327.36 mi (6,964.21 km) |
| Oostakker to Overland (Missouri) | 4,365.22 mi (7,025.15 km) |
| Oostakker to Overland Park (Kansas) | 4,516.82 mi (7,269.12 km) |
| Oostakker to Overlea (Maryland) | 3,790.67 mi (6,100.50 km) |
| Oostakker to Oviedo (Florida) | 4,495.08 mi (7,234.14 km) |
| Oostakker to Owasso (Oklahoma) | 4,691.53 mi (7,550.29 km) |
| Oostakker to Owatonna (Minnesota) | 4,206.79 mi (6,770.18 km) |
| Oostakker to Owensboro (Kentucky) | 4,286.46 mi (6,898.38 km) |
| Oostakker to Owings Mills (Maryland) | 3,799.60 mi (6,114.86 km) |
| Oostakker to Owosso (Michigan) | 3,926.20 mi (6,318.61 km) |
