| Halstead to Oakley (California) | 5,320.54 mi (8,562.57 km) |
| Halstead to Oakton (Virginia) | 3,697.71 mi (5,950.89 km) |
| Halstead to Oakville (Missouri) | 4,229.55 mi (6,806.80 km) |
| Halstead to Oatfield (Oregon) | 4,913.78 mi (7,907.96 km) |
| Halstead to Ocala (Florida) | 4,364.32 mi (7,023.69 km) |
| Halstead to Ocean Acres (New Jersey) | 3,536.92 mi (5,692.12 km) |
| Halstead to Ocean City (New Jersey) | 3,571.23 mi (5,747.34 km) |
| Halstead to Ocean Pines (Maryland) | 3,633.41 mi (5,847.41 km) |
| Halstead to Ocean Pointe (Hawaii) | 7,213.38 mi (11,608.82 km) |
| Halstead to Ocean Springs (Mississippi) | 4,572.56 mi (7,358.82 km) |
| Halstead to Oceanside (California) | 5,462.58 mi (8,791.17 km) |
| Halstead to Oceanside (New York) | 3,471.43 mi (5,586.72 km) |
| Halstead to Ocoee (Florida) | 4,368.86 mi (7,031.00 km) |
| Halstead to Oconomowoc (Wisconsin) | 3,937.52 mi (6,336.83 km) |
| Halstead to Odenton (Maryland) | 3,665.10 mi (5,898.40 km) |
