| Tortona to Oswego (Illinois) | 4,576.20 mi (7,364.68 km) |
| Tortona to Oswego (New York) | 4,021.23 mi (6,471.55 km) |
| Tortona to Otsego (Minnesota) | 4,616.93 mi (7,430.23 km) |
| Tortona to Ottawa (Illinois) | 4,610.13 mi (7,419.30 km) |
| Tortona to Ottawa (Kansas) | 4,990.67 mi (8,031.71 km) |
| Tortona to Ottumwa (Iowa) | 4,766.28 mi (7,670.58 km) |
| Tortona to Overland (Missouri) | 4,792.13 mi (7,712.19 km) |
| Tortona to Overland Park (Kansas) | 4,954.49 mi (7,973.47 km) |
| Tortona to Overlea (Maryland) | 4,183.27 mi (6,732.32 km) |
| Tortona to Oviedo (Florida) | 4,853.81 mi (7,811.46 km) |
| Tortona to Owasso (Oklahoma) | 5,124.37 mi (8,246.87 km) |
| Tortona to Owatonna (Minnesota) | 4,656.14 mi (7,493.33 km) |
| Tortona to Owensboro (Kentucky) | 4,701.79 mi (7,566.80 km) |
| Tortona to Owings Mills (Maryland) | 4,193.20 mi (6,748.31 km) |
| Tortona to Owosso (Michigan) | 4,353.63 mi (7,006.49 km) |
