| Sfantu-Gheorghe to Olympia Heights (Florida) | 5,673.34 mi (9,130.36 km) |
| Sfantu-Gheorghe to Omaha (Nebraska) | 5,432.70 mi (8,743.09 km) |
| Sfantu-Gheorghe to On Top of the World Designated Place (Florida) | 5,580.92 mi (8,981.63 km) |
| Sfantu-Gheorghe to Onalaska (Wisconsin) | 5,137.20 mi (8,267.52 km) |
| Sfantu-Gheorghe to Oneida (New York) | 4,635.87 mi (7,460.71 km) |
| Sfantu-Gheorghe to Oneonta (New York) | 4,642.30 mi (7,471.06 km) |
| Sfantu-Gheorghe to Ontario (California) | 6,462.00 mi (10,399.58 km) |
| Sfantu-Gheorghe to Ontario (Oregon) | 5,821.29 mi (9,368.46 km) |
| Sfantu-Gheorghe to Opa-locka (Florida) | 5,660.87 mi (9,110.29 km) |
| Sfantu-Gheorghe to Opelika (Alabama) | 5,519.43 mi (8,882.66 km) |
| Sfantu-Gheorghe to Opelousas (Louisiana) | 5,884.99 mi (9,470.98 km) |
| Sfantu-Gheorghe to Orange (California) | 6,481.93 mi (10,431.66 km) |
| Sfantu-Gheorghe to Orange (Texas) | 5,968.31 mi (9,605.07 km) |
| Sfantu-Gheorghe to Orange City (Florida) | 5,549.06 mi (8,930.35 km) |
| Sfantu-Gheorghe to Orangeburg (South Carolina) | 5,301.29 mi (8,531.59 km) |
