| Rapid City to Orangeburg (South Carolina) | 1,401.56 mi (2,255.60 km) |
| Rapid City to Orangevale (California) | 1,001.98 mi (1,612.53 km) |
| Rapid City to Orchards (Washington) | 949.63 mi (1,528.28 km) |
| Rapid City to Orcutt (California) | 1,112.66 mi (1,790.65 km) |
| Rapid City to Oregon (Ohio) | 1,013.47 mi (1,631.03 km) |
| Rapid City to Oregon (Wisconsin) | 696.89 mi (1,121.54 km) |
| Rapid City to Oregon City (Oregon) | 953.00 mi (1,533.70 km) |
| Rapid City to Orem (Utah) | 505.99 mi (814.31 km) |
| Rapid City to Orinda (California) | 1,074.26 mi (1,728.86 km) |
| Rapid City to Orland Park (Illinois) | 795.26 mi (1,279.84 km) |
| Rapid City to Orlando (Florida) | 1,617.50 mi (2,603.11 km) |
| Rapid City to Ormond Beach (Florida) | 1,585.84 mi (2,552.17 km) |
| Rapid City to Oro Valley (Arizona) | 907.36 mi (1,460.25 km) |
| Rapid City to Oroville (California) | 993.89 mi (1,599.51 km) |
| Rapid City to Oshkosh (Wisconsin) | 727.02 mi (1,170.02 km) |
