| Alassio to Olympia Heights (Florida) | 4,935.56 mi (7,943.02 km) |
| Alassio to Omaha (Nebraska) | 4,906.69 mi (7,896.56 km) |
| Alassio to On Top of the World Designated Place (Florida) | 4,874.78 mi (7,845.19 km) |
| Alassio to Onalaska (Wisconsin) | 4,601.68 mi (7,405.68 km) |
| Alassio to Oneida (New York) | 4,002.74 mi (6,441.78 km) |
| Alassio to Oneonta (New York) | 4,000.32 mi (6,437.89 km) |
| Alassio to Ontario (California) | 6,058.47 mi (9,750.17 km) |
| Alassio to Ontario (Oregon) | 5,481.57 mi (8,821.73 km) |
| Alassio to Opa-locka (Florida) | 4,923.70 mi (7,923.94 km) |
| Alassio to Opelika (Alabama) | 4,855.74 mi (7,814.56 km) |
| Alassio to Opelousas (Louisiana) | 5,248.38 mi (8,446.46 km) |
| Alassio to Orange (California) | 6,078.89 mi (9,783.04 km) |
| Alassio to Orange (Texas) | 5,340.19 mi (8,594.20 km) |
| Alassio to Orange City (Florida) | 4,836.30 mi (7,783.27 km) |
| Alassio to Orangeburg (South Carolina) | 4,617.55 mi (7,431.23 km) |
