| Brussels to Oswego (Illinois) | 4,174.96 mi (6,718.95 km) |
| Brussels to Oswego (New York) | 3,640.26 mi (5,858.43 km) |
| Brussels to Otsego (Minnesota) | 4,194.63 mi (6,750.60 km) |
| Brussels to Ottawa (Illinois) | 4,208.90 mi (6,773.57 km) |
| Brussels to Ottawa (Kansas) | 4,583.43 mi (7,376.31 km) |
| Brussels to Ottumwa (Iowa) | 4,358.26 mi (7,013.94 km) |
| Brussels to Overland (Missouri) | 4,396.02 mi (7,074.72 km) |
| Brussels to Overland Park (Kansas) | 4,547.72 mi (7,318.85 km) |
| Brussels to Overlea (Maryland) | 3,820.81 mi (6,148.99 km) |
| Brussels to Oviedo (Florida) | 4,524.35 mi (7,281.24 km) |
| Brussels to Owasso (Oklahoma) | 4,722.40 mi (7,599.96 km) |
| Brussels to Owatonna (Minnesota) | 4,237.70 mi (6,819.92 km) |
| Brussels to Owensboro (Kentucky) | 4,317.09 mi (6,947.69 km) |
| Brussels to Owings Mills (Maryland) | 3,829.76 mi (6,163.40 km) |
| Brussels to Owosso (Michigan) | 3,956.99 mi (6,368.17 km) |
