| Houthulst to Oakley (California) | 5,436.82 mi (8,749.71 km) |
| Houthulst to Oakton (Virginia) | 3,813.90 mi (6,137.87 km) |
| Houthulst to Oakville (Missouri) | 4,348.60 mi (6,998.40 km) |
| Houthulst to Oatfield (Oregon) | 5,027.32 mi (8,090.68 km) |
| Houthulst to Ocala (Florida) | 4,477.59 mi (7,205.98 km) |
| Houthulst to Ocean Acres (New Jersey) | 3,652.53 mi (5,878.18 km) |
| Houthulst to Ocean City (New Jersey) | 3,686.70 mi (5,933.18 km) |
| Houthulst to Ocean Pines (Maryland) | 3,748.61 mi (6,032.80 km) |
| Houthulst to Ocean Pointe (Hawaii) | 7,309.45 mi (11,763.42 km) |
| Houthulst to Ocean Springs (Mississippi) | 4,689.06 mi (7,546.31 km) |
| Houthulst to Oceanside (California) | 5,581.13 mi (8,981.96 km) |
| Houthulst to Oceanside (New York) | 3,587.30 mi (5,773.19 km) |
| Houthulst to Ocoee (Florida) | 4,481.51 mi (7,212.29 km) |
| Houthulst to Oconomowoc (Wisconsin) | 4,057.07 mi (6,529.22 km) |
| Houthulst to Odenton (Maryland) | 3,781.17 mi (6,085.21 km) |
