| San Giuliano Milanese to Olympia Heights (Florida) | 4,957.22 mi (7,977.88 km) |
| San Giuliano Milanese to Omaha (Nebraska) | 4,887.07 mi (7,864.99 km) |
| San Giuliano Milanese to On Top of the World Designated Place (Florida) | 4,888.99 mi (7,868.06 km) |
| San Giuliano Milanese to Onalaska (Wisconsin) | 4,582.92 mi (7,375.50 km) |
| San Giuliano Milanese to Oneida (New York) | 4,000.10 mi (6,437.53 km) |
| San Giuliano Milanese to Oneonta (New York) | 3,999.42 mi (6,436.44 km) |
| San Giuliano Milanese to Ontario (California) | 6,023.16 mi (9,693.33 km) |
| San Giuliano Milanese to Ontario (Oregon) | 5,436.42 mi (8,749.08 km) |
| San Giuliano Milanese to Opa-locka (Florida) | 4,945.20 mi (7,958.53 km) |
| San Giuliano Milanese to Opelika (Alabama) | 4,860.89 mi (7,822.84 km) |
| San Giuliano Milanese to Opelousas (Louisiana) | 5,248.88 mi (8,447.26 km) |
| San Giuliano Milanese to Orange (California) | 6,043.55 mi (9,726.16 km) |
| San Giuliano Milanese to Orange (Texas) | 5,339.24 mi (8,592.68 km) |
| San Giuliano Milanese to Orange City (Florida) | 4,851.94 mi (7,808.44 km) |
| San Giuliano Milanese to Orangeburg (South Carolina) | 4,626.45 mi (7,445.56 km) |
