| Horw to Oswego (Illinois) | 4,469.74 mi (7,193.36 km) |
| Horw to Oswego (New York) | 3,923.24 mi (6,313.85 km) |
| Horw to Otsego (Minnesota) | 4,500.61 mi (7,243.03 km) |
| Horw to Ottawa (Illinois) | 4,503.70 mi (7,248.00 km) |
| Horw to Ottawa (Kansas) | 4,881.67 mi (7,856.29 km) |
| Horw to Ottumwa (Iowa) | 4,656.82 mi (7,494.43 km) |
| Horw to Overland (Missouri) | 4,688.08 mi (7,544.74 km) |
| Horw to Overland Park (Kansas) | 4,845.69 mi (7,798.38 km) |
| Horw to Overlea (Maryland) | 4,093.08 mi (6,587.17 km) |
| Horw to Oviedo (Florida) | 4,777.40 mi (7,688.48 km) |
| Horw to Owasso (Oklahoma) | 5,017.84 mi (8,075.44 km) |
| Horw to Owatonna (Minnesota) | 4,541.71 mi (7,309.18 km) |
| Horw to Owensboro (Kentucky) | 4,602.68 mi (7,407.30 km) |
| Horw to Owings Mills (Maryland) | 4,102.62 mi (6,602.53 km) |
| Horw to Owosso (Michigan) | 4,249.11 mi (6,838.28 km) |
