| Richland to Oskaloosa (Iowa) | 1,366.30 mi (2,198.84 km) |
| Richland to Oswego (Illinois) | 1,561.00 mi (2,512.19 km) |
| Richland to Oswego (New York) | 2,079.10 mi (3,345.99 km) |
| Richland to Otsego (Minnesota) | 1,233.84 mi (1,985.67 km) |
| Richland to Ottawa (Illinois) | 1,546.38 mi (2,488.66 km) |
| Richland to Ottawa (Kansas) | 1,328.57 mi (2,138.13 km) |
| Richland to Ottumwa (Iowa) | 1,384.49 mi (2,228.11 km) |
| Richland to Overland (Missouri) | 1,553.75 mi (2,500.51 km) |
| Richland to Overland Park (Kansas) | 1,345.10 mi (2,164.73 km) |
| Richland to Overlea (Maryland) | 2,191.87 mi (3,527.48 km) |
| Richland to Oviedo (Florida) | 2,385.95 mi (3,839.82 km) |
| Richland to Owasso (Oklahoma) | 1,392.56 mi (2,241.11 km) |
| Richland to Owatonna (Minnesota) | 1,272.34 mi (2,047.63 km) |
| Richland to Owensboro (Kentucky) | 1,739.26 mi (2,799.06 km) |
| Richland to Owings Mills (Maryland) | 2,177.34 mi (3,504.10 km) |
