| Sun Prairie to Oskaloosa (Iowa) | 217.64 mi (350.27 km) |
| Sun Prairie to Oswego (Illinois) | 113.27 mi (182.29 km) |
| Sun Prairie to Oswego (New York) | 639.87 mi (1,029.77 km) |
| Sun Prairie to Otsego (Minnesota) | 260.40 mi (419.07 km) |
| Sun Prairie to Ottawa (Illinois) | 127.96 mi (205.94 km) |
| Sun Prairie to Ottawa (Kansas) | 446.28 mi (718.22 km) |
| Sun Prairie to Ottumwa (Iowa) | 221.22 mi (356.02 km) |
| Sun Prairie to Overland (Missouri) | 315.52 mi (507.79 km) |
| Sun Prairie to Overland Park (Kansas) | 410.66 mi (660.89 km) |
| Sun Prairie to Overlea (Maryland) | 710.28 mi (1,143.08 km) |
| Sun Prairie to Oviedo (Florida) | 1,098.64 mi (1,768.10 km) |
| Sun Prairie to Owasso (Oklahoma) | 590.94 mi (951.03 km) |
| Sun Prairie to Owatonna (Minnesota) | 209.38 mi (336.96 km) |
| Sun Prairie to Owensboro (Kentucky) | 390.99 mi (629.24 km) |
| Sun Prairie to Owings Mills (Maryland) | 695.70 mi (1,119.62 km) |
