| Horsforth to Oswego (Illinois) | 3,854.34 mi (6,202.96 km) |
| Horsforth to Oswego (New York) | 3,327.06 mi (5,354.38 km) |
| Horsforth to Otsego (Minnesota) | 3,869.23 mi (6,226.92 km) |
| Horsforth to Ottawa (Illinois) | 3,888.25 mi (6,257.54 km) |
| Horsforth to Ottawa (Kansas) | 4,260.95 mi (6,857.33 km) |
| Horsforth to Ottumwa (Iowa) | 4,035.71 mi (6,494.84 km) |
| Horsforth to Overland (Missouri) | 4,076.74 mi (6,560.88 km) |
| Horsforth to Overland Park (Kansas) | 4,225.38 mi (6,800.09 km) |
| Horsforth to Overlea (Maryland) | 3,514.71 mi (5,656.37 km) |
| Horsforth to Oviedo (Florida) | 4,231.22 mi (6,809.49 km) |
| Horsforth to Owasso (Oklahoma) | 4,401.20 mi (7,083.04 km) |
| Horsforth to Owatonna (Minnesota) | 3,912.94 mi (6,297.27 km) |
| Horsforth to Owensboro (Kentucky) | 4,001.60 mi (6,439.95 km) |
| Horsforth to Owings Mills (Maryland) | 3,523.22 mi (5,670.08 km) |
| Horsforth to Owosso (Michigan) | 3,637.94 mi (5,854.70 km) |
