| Salerno to Olympia Heights (Florida) | 5,331.32 mi (8,579.94 km) |
| Salerno to Omaha (Nebraska) | 5,310.43 mi (8,546.31 km) |
| Salerno to On Top of the World Designated Place (Florida) | 5,276.09 mi (8,491.04 km) |
| Salerno to Onalaska (Wisconsin) | 5,005.78 mi (8,056.02 km) |
| Salerno to Oneida (New York) | 4,409.87 mi (7,097.01 km) |
| Salerno to Oneonta (New York) | 4,407.31 mi (7,092.88 km) |
| Salerno to Ontario (California) | 6,450.48 mi (10,381.04 km) |
| Salerno to Ontario (Oregon) | 5,861.50 mi (9,433.18 km) |
| Salerno to Opa-locka (Florida) | 5,319.62 mi (8,561.10 km) |
| Salerno to Opelika (Alabama) | 5,261.31 mi (8,467.26 km) |
| Salerno to Opelousas (Louisiana) | 5,655.07 mi (9,100.95 km) |
| Salerno to Orange (California) | 6,470.87 mi (10,413.86 km) |
| Salerno to Orange (Texas) | 5,747.09 mi (9,249.05 km) |
| Salerno to Orange City (Florida) | 5,236.71 mi (8,427.67 km) |
| Salerno to Orangeburg (South Carolina) | 5,021.74 mi (8,081.71 km) |
