| Rolla to Oskaloosa (Iowa) | 235.90 mi (379.64 km) |
| Rolla to Oswego (Illinois) | 315.69 mi (508.05 km) |
| Rolla to Oswego (New York) | 883.47 mi (1,421.80 km) |
| Rolla to Otsego (Minnesota) | 514.77 mi (828.44 km) |
| Rolla to Ottawa (Illinois) | 282.57 mi (454.75 km) |
| Rolla to Ottawa (Kansas) | 195.29 mi (314.29 km) |
| Rolla to Ottumwa (Iowa) | 215.24 mi (346.40 km) |
| Rolla to Overland (Missouri) | 91.55 mi (147.34 km) |
| Rolla to Overland Park (Kansas) | 171.23 mi (275.57 km) |
| Rolla to Overlea (Maryland) | 827.28 mi (1,331.38 km) |
| Rolla to Oviedo (Florida) | 884.56 mi (1,423.56 km) |
| Rolla to Owasso (Oklahoma) | 251.79 mi (405.22 km) |
| Rolla to Owatonna (Minnesota) | 431.44 mi (694.34 km) |
| Rolla to Owensboro (Kentucky) | 253.64 mi (408.19 km) |
| Rolla to Owings Mills (Maryland) | 812.80 mi (1,308.07 km) |
