| San Salvo to Olympia Heights (Florida) | 5,293.32 mi (8,518.78 km) |
| San Salvo to Omaha (Nebraska) | 5,244.23 mi (8,439.77 km) |
| San Salvo to On Top of the World Designated Place (Florida) | 5,232.44 mi (8,420.80 km) |
| San Salvo to Onalaska (Wisconsin) | 4,940.13 mi (7,950.37 km) |
| San Salvo to Oneida (New York) | 4,354.27 mi (7,007.51 km) |
| San Salvo to Oneonta (New York) | 4,352.83 mi (7,005.21 km) |
| San Salvo to Ontario (California) | 6,375.08 mi (10,259.70 km) |
| San Salvo to Ontario (Oregon) | 5,781.30 mi (9,304.11 km) |
| San Salvo to Opa-locka (Florida) | 5,281.48 mi (8,499.73 km) |
| San Salvo to Opelika (Alabama) | 5,211.14 mi (8,386.52 km) |
| San Salvo to Opelousas (Louisiana) | 5,601.78 mi (9,015.19 km) |
| San Salvo to Orange (California) | 6,395.46 mi (10,292.50 km) |
| San Salvo to Orange (Texas) | 5,692.83 mi (9,161.73 km) |
| San Salvo to Orange City (Florida) | 5,194.10 mi (8,359.10 km) |
| San Salvo to Orangeburg (South Carolina) | 4,974.14 mi (8,005.11 km) |
