| Houthulst to Oswego (Illinois) | 4,117.72 mi (6,626.83 km) |
| Houthulst to Oswego (New York) | 3,581.14 mi (5,763.29 km) |
| Houthulst to Otsego (Minnesota) | 4,140.14 mi (6,662.91 km) |
| Houthulst to Ottawa (Illinois) | 4,151.66 mi (6,681.46 km) |
| Houthulst to Ottawa (Kansas) | 4,526.93 mi (7,285.39 km) |
| Houthulst to Ottumwa (Iowa) | 4,301.81 mi (6,923.10 km) |
| Houthulst to Overland (Missouri) | 4,338.31 mi (6,981.84 km) |
| Houthulst to Overland Park (Kansas) | 4,491.16 mi (7,227.82 km) |
| Houthulst to Overlea (Maryland) | 3,760.61 mi (6,052.12 km) |
| Houthulst to Oviedo (Florida) | 4,463.06 mi (7,182.60 km) |
| Houthulst to Owasso (Oklahoma) | 4,665.33 mi (7,508.13 km) |
| Houthulst to Owatonna (Minnesota) | 4,182.62 mi (6,731.28 km) |
| Houthulst to Owensboro (Kentucky) | 4,258.38 mi (6,853.20 km) |
| Houthulst to Owings Mills (Maryland) | 3,769.61 mi (6,066.60 km) |
| Houthulst to Owosso (Michigan) | 3,899.25 mi (6,275.23 km) |
