| Torre Annunziata to Olympia Heights (Florida) | 5,314.06 mi (8,552.16 km) |
| Torre Annunziata to Omaha (Nebraska) | 5,294.85 mi (8,521.24 km) |
| Torre Annunziata to On Top of the World Designated Place (Florida) | 5,258.97 mi (8,463.50 km) |
| Torre Annunziata to Onalaska (Wisconsin) | 4,990.14 mi (8,030.86 km) |
| Torre Annunziata to Oneida (New York) | 4,393.37 mi (7,070.44 km) |
| Torre Annunziata to Oneonta (New York) | 4,390.72 mi (7,066.18 km) |
| Torre Annunziata to Ontario (California) | 6,436.17 mi (10,358.01 km) |
| Torre Annunziata to Ontario (Oregon) | 5,848.15 mi (9,411.69 km) |
| Torre Annunziata to Opa-locka (Florida) | 5,302.36 mi (8,533.32 km) |
| Torre Annunziata to Opelika (Alabama) | 5,244.46 mi (8,440.15 km) |
| Torre Annunziata to Opelousas (Louisiana) | 5,638.39 mi (9,074.11 km) |
| Torre Annunziata to Orange (California) | 6,456.57 mi (10,390.84 km) |
| Torre Annunziata to Orange (Texas) | 5,730.47 mi (9,222.30 km) |
| Torre Annunziata to Orange City (Florida) | 5,219.56 mi (8,400.07 km) |
| Torre Annunziata to Orangeburg (South Carolina) | 5,004.78 mi (8,054.41 km) |
