| Rapid City to Odenton (Maryland) | 1,407.46 mi (2,265.09 km) |
| Rapid City to Odessa (Texas) | 843.69 mi (1,357.78 km) |
| Rapid City to Ogden (Utah) | 485.71 mi (781.67 km) |
| Rapid City to Oildale (California) | 1,027.60 mi (1,653.77 km) |
| Rapid City to Ojus (Florida) | 1,796.23 mi (2,890.76 km) |
| Rapid City to Okemos (Michigan) | 946.93 mi (1,523.94 km) |
| Rapid City to Oklahoma City (Oklahoma) | 666.85 mi (1,073.20 km) |
| Rapid City to Okmulgee (Oklahoma) | 697.91 mi (1,123.17 km) |
| Rapid City to Olathe (Kansas) | 563.05 mi (906.14 km) |
| Rapid City to Old Jamestown (Missouri) | 759.94 mi (1,223.01 km) |
| Rapid City to Oldsmar (Florida) | 1,586.05 mi (2,552.51 km) |
| Rapid City to Olean (New York) | 1,253.77 mi (2,017.74 km) |
| Rapid City to Olive Branch (Mississippi) | 948.78 mi (1,526.91 km) |
| Rapid City to Olivehurst (California) | 1,005.93 mi (1,618.89 km) |
| Rapid City to Olney (Maryland) | 1,386.64 mi (2,231.58 km) |
