| Houthulst to Odessa (Texas) | 5,139.05 mi (8,270.50 km) |
| Houthulst to Ogden (Utah) | 4,960.16 mi (7,982.61 km) |
| Houthulst to Oildale (California) | 5,507.35 mi (8,863.22 km) |
| Houthulst to Ojus (Florida) | 4,554.94 mi (7,330.46 km) |
| Houthulst to Okemos (Michigan) | 3,921.48 mi (6,311.01 km) |
| Houthulst to Oklahoma City (Oklahoma) | 4,770.43 mi (7,677.27 km) |
| Houthulst to Okmulgee (Oklahoma) | 4,706.45 mi (7,574.30 km) |
| Houthulst to Olathe (Kansas) | 4,496.27 mi (7,236.04 km) |
| Houthulst to Old Jamestown (Missouri) | 4,328.13 mi (6,965.45 km) |
| Houthulst to Oldsmar (Florida) | 4,555.66 mi (7,331.63 km) |
| Houthulst to Olean (New York) | 3,716.79 mi (5,981.59 km) |
| Houthulst to Olive Branch (Mississippi) | 4,502.50 mi (7,246.07 km) |
| Houthulst to Olivehurst (California) | 5,369.17 mi (8,640.84 km) |
| Houthulst to Olney (Maryland) | 3,792.91 mi (6,104.09 km) |
| Houthulst to Olympia (Washington) | 4,940.13 mi (7,950.37 km) |
