| Boortmeerbeek to Oswego (Illinois) | 4,178.11 mi (6,724.01 km) |
| Boortmeerbeek to Oswego (New York) | 3,644.57 mi (5,865.37 km) |
| Boortmeerbeek to Otsego (Minnesota) | 4,196.41 mi (6,753.46 km) |
| Boortmeerbeek to Ottawa (Illinois) | 4,212.04 mi (6,778.62 km) |
| Boortmeerbeek to Ottawa (Kansas) | 4,586.17 mi (7,380.72 km) |
| Boortmeerbeek to Ottumwa (Iowa) | 4,360.97 mi (7,018.31 km) |
| Boortmeerbeek to Overland (Missouri) | 4,399.43 mi (7,080.20 km) |
| Boortmeerbeek to Overland Park (Kansas) | 4,550.49 mi (7,323.31 km) |
| Boortmeerbeek to Overlea (Maryland) | 3,825.96 mi (6,157.29 km) |
| Boortmeerbeek to Oviedo (Florida) | 4,530.72 mi (7,291.49 km) |
| Boortmeerbeek to Owasso (Oklahoma) | 4,725.43 mi (7,604.85 km) |
| Boortmeerbeek to Owatonna (Minnesota) | 4,239.75 mi (6,823.22 km) |
| Boortmeerbeek to Owensboro (Kentucky) | 4,321.12 mi (6,954.17 km) |
| Boortmeerbeek to Owings Mills (Maryland) | 3,834.86 mi (6,171.62 km) |
| Boortmeerbeek to Owosso (Michigan) | 3,960.43 mi (6,373.70 km) |
