| Madeley to Oswego (Illinois) | 3,860.36 mi (6,212.66 km) |
| Madeley to Oswego (New York) | 3,324.27 mi (5,349.89 km) |
| Madeley to Otsego (Minnesota) | 3,885.03 mi (6,252.35 km) |
| Madeley to Ottawa (Illinois) | 3,894.31 mi (6,267.29 km) |
| Madeley to Ottawa (Kansas) | 4,269.92 mi (6,871.77 km) |
| Madeley to Ottumwa (Iowa) | 4,044.83 mi (6,509.53 km) |
| Madeley to Overland (Missouri) | 4,080.87 mi (6,567.52 km) |
| Madeley to Overland Park (Kansas) | 4,234.11 mi (6,814.14 km) |
| Madeley to Overlea (Maryland) | 3,505.58 mi (5,641.69 km) |
| Madeley to Oviedo (Florida) | 4,213.10 mi (6,780.32 km) |
| Madeley to Owasso (Oklahoma) | 4,408.03 mi (7,094.04 km) |
| Madeley to Owatonna (Minnesota) | 3,926.83 mi (6,319.62 km) |
| Madeley to Owensboro (Kentucky) | 4,001.19 mi (6,439.29 km) |
| Madeley to Owings Mills (Maryland) | 3,514.45 mi (5,655.97 km) |
| Madeley to Owosso (Michigan) | 3,641.80 mi (5,860.91 km) |
