| Petrosani to Olympia Heights (Florida) | 5,585.48 mi (8,988.97 km) |
| Petrosani to Omaha (Nebraska) | 5,379.07 mi (8,656.77 km) |
| Petrosani to On Top of the World Designated Place (Florida) | 5,498.46 mi (8,848.92 km) |
| Petrosani to Onalaska (Wisconsin) | 5,081.45 mi (8,177.81 km) |
| Petrosani to Oneida (New York) | 4,563.90 mi (7,344.89 km) |
| Petrosani to Oneonta (New York) | 4,568.94 mi (7,353.01 km) |
| Petrosani to Ontario (California) | 6,429.50 mi (10,347.28 km) |
| Petrosani to Ontario (Oregon) | 5,796.73 mi (9,328.94 km) |
| Petrosani to Opa-locka (Florida) | 5,573.11 mi (8,969.06 km) |
| Petrosani to Opelika (Alabama) | 5,444.01 mi (8,761.29 km) |
| Petrosani to Opelousas (Louisiana) | 5,814.61 mi (9,357.71 km) |
| Petrosani to Orange (California) | 6,449.55 mi (10,379.55 km) |
| Petrosani to Orange (Texas) | 5,899.45 mi (9,494.25 km) |
| Petrosani to Orange City (Florida) | 5,465.43 mi (8,795.75 km) |
| Petrosani to Orangeburg (South Carolina) | 5,222.23 mi (8,404.37 km) |
