| Halstead to Orangevale (California) | 5,266.21 mi (8,475.15 km) |
| Halstead to Orchards (Washington) | 4,896.10 mi (7,879.50 km) |
| Halstead to Orcutt (California) | 5,464.80 mi (8,794.75 km) |
| Halstead to Oregon (Ohio) | 3,813.12 mi (6,136.62 km) |
| Halstead to Oregon (Wisconsin) | 3,978.82 mi (6,403.30 km) |
| Halstead to Oregon City (Oregon) | 4,917.83 mi (7,914.49 km) |
| Halstead to Orem (Utah) | 4,884.65 mi (7,861.09 km) |
| Halstead to Orinda (California) | 5,341.14 mi (8,595.73 km) |
| Halstead to Orland Park (Illinois) | 3,984.09 mi (6,411.77 km) |
| Halstead to Orlando (Florida) | 4,365.87 mi (7,026.19 km) |
| Halstead to Ormond Beach (Florida) | 4,314.81 mi (6,944.01 km) |
| Halstead to Oro Valley (Arizona) | 5,297.78 mi (8,525.95 km) |
| Halstead to Oroville (California) | 5,228.85 mi (8,415.02 km) |
| Halstead to Oshkosh (Wisconsin) | 3,896.93 mi (6,271.50 km) |
| Halstead to Oskaloosa (Iowa) | 4,177.04 mi (6,722.29 km) |
