| Macerata Campania to Olympia Heights (Florida) | 5,297.23 mi (8,525.07 km) |
| Macerata Campania to Omaha (Nebraska) | 5,273.38 mi (8,486.68 km) |
| Macerata Campania to On Top of the World Designated Place (Florida) | 5,241.10 mi (8,434.74 km) |
| Macerata Campania to Onalaska (Wisconsin) | 4,968.74 mi (7,996.41 km) |
| Macerata Campania to Oneida (New York) | 4,373.43 mi (7,038.36 km) |
| Macerata Campania to Oneonta (New York) | 4,370.97 mi (7,034.40 km) |
| Macerata Campania to Ontario (California) | 6,413.60 mi (10,321.69 km) |
| Macerata Campania to Ontario (Oregon) | 5,825.13 mi (9,374.65 km) |
| Macerata Campania to Opa-locka (Florida) | 5,285.50 mi (8,506.19 km) |
| Macerata Campania to Opelika (Alabama) | 5,225.45 mi (8,409.56 km) |
| Macerata Campania to Opelousas (Louisiana) | 5,618.87 mi (9,042.70 km) |
| Macerata Campania to Orange (California) | 6,434.00 mi (10,354.51 km) |
| Macerata Campania to Orange (Texas) | 5,710.80 mi (9,190.65 km) |
| Macerata Campania to Orange City (Florida) | 5,201.88 mi (8,371.61 km) |
| Macerata Campania to Orangeburg (South Carolina) | 4,986.20 mi (8,024.52 km) |
