| Sulphur to Orangeburg (South Carolina) | 766.25 mi (1,233.16 km) |
| Sulphur to Orangevale (California) | 1,683.56 mi (2,709.42 km) |
| Sulphur to Orchards (Washington) | 1,898.03 mi (3,054.58 km) |
| Sulphur to Orcutt (California) | 1,603.44 mi (2,580.49 km) |
| Sulphur to Oregon (Ohio) | 963.49 mi (1,550.60 km) |
| Sulphur to Oregon (Wisconsin) | 904.16 mi (1,455.10 km) |
| Sulphur to Oregon City (Oregon) | 1,891.11 mi (3,043.45 km) |
| Sulphur to Orem (Utah) | 1,242.94 mi (2,000.32 km) |
| Sulphur to Orinda (California) | 1,724.48 mi (2,775.29 km) |
| Sulphur to Orland Park (Illinois) | 843.70 mi (1,357.80 km) |
| Sulphur to Orlando (Florida) | 733.53 mi (1,180.50 km) |
| Sulphur to Ormond Beach (Florida) | 737.49 mi (1,186.88 km) |
| Sulphur to Oro Valley (Arizona) | 1,049.71 mi (1,689.34 km) |
| Sulphur to Oroville (California) | 1,713.64 mi (2,757.84 km) |
| Sulphur to Oshkosh (Wisconsin) | 988.53 mi (1,590.89 km) |
