| Cologno al Serio to Oswego (Illinois) | 4,581.01 mi (7,372.42 km) |
| Cologno al Serio to Oswego (New York) | 4,030.80 mi (6,486.94 km) |
| Cologno al Serio to Otsego (Minnesota) | 4,615.54 mi (7,427.99 km) |
| Cologno al Serio to Ottawa (Illinois) | 4,614.96 mi (7,427.06 km) |
| Cologno al Serio to Ottawa (Kansas) | 4,993.99 mi (8,037.05 km) |
| Cologno al Serio to Ottumwa (Iowa) | 4,769.29 mi (7,675.43 km) |
| Cologno al Serio to Overland (Missouri) | 4,798.38 mi (7,722.25 km) |
| Cologno al Serio to Overland Park (Kansas) | 4,957.92 mi (7,979.00 km) |
| Cologno al Serio to Overlea (Maryland) | 4,196.98 mi (6,754.38 km) |
| Cologno al Serio to Oviedo (Florida) | 4,874.30 mi (7,844.42 km) |
| Cologno al Serio to Owasso (Oklahoma) | 5,129.19 mi (8,254.63 km) |
| Cologno al Serio to Owatonna (Minnesota) | 4,656.00 mi (7,493.11 km) |
| Cologno al Serio to Owensboro (Kentucky) | 4,710.83 mi (7,581.35 km) |
| Cologno al Serio to Owings Mills (Maryland) | 4,206.71 mi (6,770.05 km) |
| Cologno al Serio to Owosso (Michigan) | 4,359.56 mi (7,016.03 km) |
