| Horley to Oswego (Illinois) | 3,992.67 mi (6,425.58 km) |
| Horley to Oswego (New York) | 3,451.69 mi (5,554.96 km) |
| Horley to Otsego (Minnesota) | 4,021.55 mi (6,472.07 km) |
| Horley to Ottawa (Illinois) | 4,026.63 mi (6,480.23 km) |
| Horley to Ottawa (Kansas) | 4,403.56 mi (7,086.85 km) |
| Horley to Ottumwa (Iowa) | 4,178.60 mi (6,724.81 km) |
| Horley to Overland (Missouri) | 4,212.11 mi (6,778.74 km) |
| Horley to Overland Park (Kansas) | 4,367.65 mi (7,029.05 km) |
| Horley to Overlea (Maryland) | 3,628.51 mi (5,839.52 km) |
| Horley to Oviedo (Florida) | 4,328.19 mi (6,965.55 km) |
| Horley to Owasso (Oklahoma) | 4,540.61 mi (7,307.40 km) |
| Horley to Owatonna (Minnesota) | 4,062.65 mi (6,538.20 km) |
| Horley to Owensboro (Kentucky) | 4,129.83 mi (6,646.32 km) |
| Horley to Owings Mills (Maryland) | 3,637.64 mi (5,854.21 km) |
| Horley to Owosso (Michigan) | 3,773.04 mi (6,072.12 km) |
