| Wauwatosa to Oskaloosa (Iowa) | 265.58 mi (427.41 km) |
| Wauwatosa to Oswego (Illinois) | 96.47 mi (155.25 km) |
| Wauwatosa to Oswego (New York) | 580.56 mi (934.33 km) |
| Wauwatosa to Otsego (Minnesota) | 315.86 mi (508.33 km) |
| Wauwatosa to Ottawa (Illinois) | 124.64 mi (200.59 km) |
| Wauwatosa to Ottawa (Kansas) | 487.40 mi (784.39 km) |
| Wauwatosa to Ottumwa (Iowa) | 265.49 mi (427.26 km) |
| Wauwatosa to Overland (Missouri) | 325.27 mi (523.48 km) |
| Wauwatosa to Overland Park (Kansas) | 450.99 mi (725.79 km) |
| Wauwatosa to Overlea (Maryland) | 650.14 mi (1,046.30 km) |
| Wauwatosa to Oviedo (Florida) | 1,065.54 mi (1,714.82 km) |
| Wauwatosa to Owasso (Oklahoma) | 624.68 mi (1,005.33 km) |
| Wauwatosa to Owatonna (Minnesota) | 269.61 mi (433.90 km) |
| Wauwatosa to Owensboro (Kentucky) | 369.64 mi (594.87 km) |
| Wauwatosa to Owings Mills (Maryland) | 635.62 mi (1,022.93 km) |
