| Houthulst to Orangevale (California) | 5,382.46 mi (8,662.24 km) |
| Houthulst to Orchards (Washington) | 5,009.55 mi (8,062.10 km) |
| Houthulst to Orcutt (California) | 5,582.26 mi (8,983.77 km) |
| Houthulst to Oregon (Ohio) | 3,931.79 mi (6,327.60 km) |
| Houthulst to Oregon (Wisconsin) | 4,098.41 mi (6,595.76 km) |
| Houthulst to Oregon City (Oregon) | 5,031.40 mi (8,097.25 km) |
| Houthulst to Orem (Utah) | 5,003.07 mi (8,051.67 km) |
| Houthulst to Orinda (California) | 5,457.28 mi (8,782.64 km) |
| Houthulst to Orland Park (Illinois) | 4,103.37 mi (6,603.73 km) |
| Houthulst to Orlando (Florida) | 4,478.36 mi (7,207.23 km) |
| Houthulst to Ormond Beach (Florida) | 4,427.63 mi (7,125.58 km) |
| Houthulst to Oro Valley (Arizona) | 5,417.35 mi (8,718.38 km) |
| Houthulst to Oroville (California) | 5,344.75 mi (8,601.55 km) |
| Houthulst to Oshkosh (Wisconsin) | 4,016.57 mi (6,464.04 km) |
| Houthulst to Oskaloosa (Iowa) | 4,296.68 mi (6,914.85 km) |
