| Aosta to Oswego (Illinois) | 4,481.27 mi (7,211.91 km) |
| Aosta to Oswego (New York) | 3,926.86 mi (6,319.67 km) |
| Aosta to Otsego (Minnesota) | 4,522.11 mi (7,277.63 km) |
| Aosta to Ottawa (Illinois) | 4,515.21 mi (7,266.53 km) |
| Aosta to Ottawa (Kansas) | 4,895.69 mi (7,878.85 km) |
| Aosta to Ottumwa (Iowa) | 4,671.29 mi (7,517.71 km) |
| Aosta to Overland (Missouri) | 4,697.32 mi (7,559.60 km) |
| Aosta to Overland Park (Kansas) | 4,859.50 mi (7,820.61 km) |
| Aosta to Overlea (Maryland) | 4,089.85 mi (6,581.98 km) |
| Aosta to Oviedo (Florida) | 4,762.98 mi (7,665.28 km) |
| Aosta to Owasso (Oklahoma) | 5,029.45 mi (8,094.11 km) |
| Aosta to Owatonna (Minnesota) | 4,561.22 mi (7,340.57 km) |
| Aosta to Owensboro (Kentucky) | 4,607.34 mi (7,414.80 km) |
| Aosta to Owings Mills (Maryland) | 4,099.73 mi (6,597.88 km) |
| Aosta to Owosso (Michigan) | 4,258.79 mi (6,853.85 km) |
