| Blackburn to Oswego (Illinois) | 3,826.04 mi (6,157.42 km) |
| Blackburn to Oswego (New York) | 3,296.86 mi (5,305.79 km) |
| Blackburn to Otsego (Minnesota) | 3,843.34 mi (6,185.25 km) |
| Blackburn to Ottawa (Illinois) | 3,859.96 mi (6,212.01 km) |
| Blackburn to Ottawa (Kansas) | 4,233.36 mi (6,812.94 km) |
| Blackburn to Ottumwa (Iowa) | 4,008.14 mi (6,450.48 km) |
| Blackburn to Overland (Missouri) | 4,048.03 mi (6,514.67 km) |
| Blackburn to Overland Park (Kansas) | 4,197.73 mi (6,755.59 km) |
| Blackburn to Overlea (Maryland) | 3,483.37 mi (5,605.94 km) |
| Blackburn to Oviedo (Florida) | 4,198.54 mi (6,756.89 km) |
| Blackburn to Owasso (Oklahoma) | 4,373.12 mi (7,037.85 km) |
| Blackburn to Owatonna (Minnesota) | 3,886.55 mi (6,254.81 km) |
| Blackburn to Owensboro (Kentucky) | 3,971.92 mi (6,392.18 km) |
| Blackburn to Owings Mills (Maryland) | 3,491.95 mi (5,619.74 km) |
| Blackburn to Owosso (Michigan) | 3,609.14 mi (5,808.35 km) |
