| Orsova to Olympia Heights (Florida) | 5,564.86 mi (8,955.78 km) |
| Orsova to Omaha (Nebraska) | 5,382.09 mi (8,661.64 km) |
| Orsova to On Top of the World Designated Place (Florida) | 5,481.96 mi (8,822.36 km) |
| Orsova to Onalaska (Wisconsin) | 5,083.28 mi (8,180.75 km) |
| Orsova to Oneida (New York) | 4,555.25 mi (7,330.97 km) |
| Orsova to Oneonta (New York) | 4,559.33 mi (7,337.53 km) |
| Orsova to Ontario (California) | 6,444.63 mi (10,371.63 km) |
| Orsova to Ontario (Oregon) | 5,816.50 mi (9,360.75 km) |
| Orsova to Opa-locka (Florida) | 5,552.57 mi (8,936.00 km) |
| Orsova to Opelika (Alabama) | 5,432.62 mi (8,742.96 km) |
| Orsova to Opelousas (Louisiana) | 5,806.57 mi (9,344.77 km) |
| Orsova to Orange (California) | 6,464.74 mi (10,404.00 km) |
| Orsova to Orange (Texas) | 5,892.42 mi (9,482.93 km) |
| Orsova to Orange City (Florida) | 5,448.06 mi (8,767.81 km) |
| Orsova to Orangeburg (South Carolina) | 5,208.32 mi (8,381.98 km) |
