| Rapid City to Oakleaf Plantation (Florida) | 1,512.12 mi (2,433.52 km) |
| Rapid City to Oakley (California) | 1,047.50 mi (1,685.79 km) |
| Rapid City to Oakton (Virginia) | 1,382.24 mi (2,224.50 km) |
| Rapid City to Oakville (Missouri) | 773.25 mi (1,244.43 km) |
| Rapid City to Oatfield (Oregon) | 952.95 mi (1,533.62 km) |
| Rapid City to Ocala (Florida) | 1,548.51 mi (2,492.08 km) |
| Rapid City to Ocean Acres (New Jersey) | 1,509.68 mi (2,429.59 km) |
| Rapid City to Ocean City (New Jersey) | 1,505.74 mi (2,423.26 km) |
| Rapid City to Ocean Pines (Maryland) | 1,502.60 mi (2,418.20 km) |
| Rapid City to Ocean Pointe (Hawaii) | 3,476.43 mi (5,594.77 km) |
| Rapid City to Ocean Springs (Mississippi) | 1,229.71 mi (1,979.03 km) |
| Rapid City to Oceanside (California) | 1,064.61 mi (1,713.33 km) |
| Rapid City to Oceanside (New York) | 1,520.76 mi (2,447.42 km) |
| Rapid City to Ocoee (Florida) | 1,604.25 mi (2,581.79 km) |
| Rapid City to Oconomowoc (Wisconsin) | 739.04 mi (1,189.36 km) |
