| Horsell to Oswego (Illinois) | 3,972.78 mi (6,393.57 km) |
| Horsell to Oswego (New York) | 3,432.02 mi (5,523.31 km) |
| Horsell to Otsego (Minnesota) | 4,001.61 mi (6,439.97 km) |
| Horsell to Ottawa (Illinois) | 4,006.73 mi (6,448.21 km) |
| Horsell to Ottawa (Kansas) | 4,383.63 mi (7,054.77 km) |
| Horsell to Ottumwa (Iowa) | 4,158.67 mi (6,692.74 km) |
| Horsell to Overland (Missouri) | 4,192.26 mi (6,746.79 km) |
| Horsell to Overland Park (Kansas) | 4,347.72 mi (6,996.98 km) |
| Horsell to Overlea (Maryland) | 3,609.13 mi (5,808.33 km) |
| Horsell to Oviedo (Florida) | 4,309.44 mi (6,935.37 km) |
| Horsell to Owasso (Oklahoma) | 4,520.71 mi (7,275.38 km) |
| Horsell to Owatonna (Minnesota) | 4,042.69 mi (6,506.09 km) |
| Horsell to Owensboro (Kentucky) | 4,110.10 mi (6,614.56 km) |
| Horsell to Owings Mills (Maryland) | 3,618.24 mi (5,822.99 km) |
| Horsell to Owosso (Michigan) | 3,753.18 mi (6,040.16 km) |
