| River Falls to Oskaloosa (Iowa) | 246.57 mi (396.82 km) |
| River Falls to Oswego (Illinois) | 307.68 mi (495.17 km) |
| River Falls to Oswego (New York) | 803.84 mi (1,293.66 km) |
| River Falls to Otsego (Minnesota) | 56.06 mi (90.23 km) |
| River Falls to Ottawa (Illinois) | 308.75 mi (496.89 km) |
| River Falls to Ottawa (Kansas) | 453.44 mi (729.74 km) |
| River Falls to Ottumwa (Iowa) | 265.62 mi (427.47 km) |
| River Falls to Overland (Missouri) | 441.44 mi (710.42 km) |
| River Falls to Overland Park (Kansas) | 426.13 mi (685.80 km) |
| River Falls to Overlea (Maryland) | 906.64 mi (1,459.09 km) |
| River Falls to Oviedo (Florida) | 1,283.16 mi (2,065.04 km) |
| River Falls to Owasso (Oklahoma) | 615.64 mi (990.78 km) |
| River Falls to Owatonna (Minnesota) | 61.01 mi (98.19 km) |
| River Falls to Owensboro (Kentucky) | 567.64 mi (913.52 km) |
| River Falls to Owings Mills (Maryland) | 892.34 mi (1,436.09 km) |
