| Radford to Oskaloosa (Iowa) | 707.24 mi (1,138.20 km) |
| Radford to Oswego (Illinois) | 520.93 mi (838.35 km) |
| Radford to Oswego (New York) | 486.62 mi (783.14 km) |
| Radford to Otsego (Minnesota) | 879.93 mi (1,416.11 km) |
| Radford to Ottawa (Illinois) | 529.96 mi (852.88 km) |
| Radford to Ottawa (Kansas) | 807.71 mi (1,299.89 km) |
| Radford to Ottumwa (Iowa) | 690.05 mi (1,110.53 km) |
| Radford to Overland (Missouri) | 545.44 mi (877.80 km) |
| Radford to Overland Park (Kansas) | 777.96 mi (1,252.01 km) |
| Radford to Overlea (Maryland) | 268.41 mi (431.97 km) |
| Radford to Oviedo (Florida) | 586.00 mi (943.07 km) |
| Radford to Owasso (Oklahoma) | 847.04 mi (1,363.18 km) |
| Radford to Owatonna (Minnesota) | 819.25 mi (1,318.45 km) |
| Radford to Owensboro (Kentucky) | 362.38 mi (583.19 km) |
| Radford to Owings Mills (Maryland) | 258.36 mi (415.79 km) |
