| Olgiate Comasco to Oswego (Illinois) | 4,544.24 mi (7,313.24 km) |
| Olgiate Comasco to Oswego (New York) | 3,993.39 mi (6,426.74 km) |
| Olgiate Comasco to Otsego (Minnesota) | 4,579.90 mi (7,370.63 km) |
| Olgiate Comasco to Ottawa (Illinois) | 4,578.19 mi (7,367.88 km) |
| Olgiate Comasco to Ottawa (Kansas) | 4,957.46 mi (7,978.26 km) |
| Olgiate Comasco to Ottumwa (Iowa) | 4,732.81 mi (7,616.73 km) |
| Olgiate Comasco to Overland (Missouri) | 4,761.40 mi (7,662.73 km) |
| Olgiate Comasco to Overland Park (Kansas) | 4,921.38 mi (7,920.19 km) |
| Olgiate Comasco to Overlea (Maryland) | 4,159.21 mi (6,693.60 km) |
| Olgiate Comasco to Oviedo (Florida) | 4,836.30 mi (7,783.27 km) |
| Olgiate Comasco to Owasso (Oklahoma) | 5,092.42 mi (8,195.47 km) |
| Olgiate Comasco to Owatonna (Minnesota) | 4,620.10 mi (7,435.34 km) |
| Olgiate Comasco to Owensboro (Kentucky) | 4,673.49 mi (7,521.26 km) |
| Olgiate Comasco to Owings Mills (Maryland) | 4,168.96 mi (6,709.29 km) |
| Olgiate Comasco to Owosso (Michigan) | 4,322.61 mi (6,956.57 km) |
