| San Pietro in Casale to Oswego (Illinois) | 4,683.91 mi (7,538.02 km) |
| San Pietro in Casale to Oswego (New York) | 4,133.44 mi (6,652.13 km) |
| San Pietro in Casale to Otsego (Minnesota) | 4,717.87 mi (7,592.68 km) |
| San Pietro in Casale to Ottawa (Illinois) | 4,717.86 mi (7,592.66 km) |
| San Pietro in Casale to Ottawa (Kansas) | 5,096.84 mi (8,202.56 km) |
| San Pietro in Casale to Ottumwa (Iowa) | 4,872.13 mi (7,840.93 km) |
| San Pietro in Casale to Overland (Missouri) | 4,901.27 mi (7,887.82 km) |
| San Pietro in Casale to Overland Park (Kansas) | 5,060.78 mi (8,144.53 km) |
| San Pietro in Casale to Overlea (Maryland) | 4,298.90 mi (6,918.42 km) |
| San Pietro in Casale to Oviedo (Florida) | 4,974.04 mi (8,004.95 km) |
| San Pietro in Casale to Owasso (Oklahoma) | 5,232.09 mi (8,420.23 km) |
| San Pietro in Casale to Owatonna (Minnesota) | 4,758.53 mi (7,658.11 km) |
| San Pietro in Casale to Owensboro (Kentucky) | 4,813.54 mi (7,746.64 km) |
| San Pietro in Casale to Owings Mills (Maryland) | 4,308.69 mi (6,934.16 km) |
| San Pietro in Casale to Owosso (Michigan) | 4,462.45 mi (7,181.62 km) |
