| Houghton le Spring to Orangevale (California) | 5,061.99 mi (8,146.48 km) |
| Houghton le Spring to Orchards (Washington) | 4,686.18 mi (7,541.67 km) |
| Houghton le Spring to Orcutt (California) | 5,264.32 mi (8,472.11 km) |
| Houghton le Spring to Oregon (Ohio) | 3,653.56 mi (5,879.84 km) |
| Houghton le Spring to Oregon (Wisconsin) | 3,807.32 mi (6,127.29 km) |
| Houghton le Spring to Oregon City (Oregon) | 4,708.08 mi (7,576.93 km) |
| Houghton le Spring to Orem (Utah) | 4,688.60 mi (7,545.57 km) |
| Houghton le Spring to Orinda (California) | 5,136.62 mi (8,266.58 km) |
| Houghton le Spring to Orland Park (Illinois) | 3,817.59 mi (6,143.81 km) |
| Houghton le Spring to Orlando (Florida) | 4,241.59 mi (6,826.18 km) |
| Houghton le Spring to Ormond Beach (Florida) | 4,189.13 mi (6,741.76 km) |
| Houghton le Spring to Oro Valley (Arizona) | 5,111.46 mi (8,226.09 km) |
| Houghton le Spring to Oroville (California) | 5,023.73 mi (8,084.91 km) |
| Houghton le Spring to Oshkosh (Wisconsin) | 3,724.36 mi (5,993.78 km) |
| Houghton le Spring to Oskaloosa (Iowa) | 4,003.99 mi (6,443.79 km) |
