| Petrila to Olympia Heights (Florida) | 5,586.28 mi (8,990.25 km) |
| Petrila to Omaha (Nebraska) | 5,378.65 mi (8,656.09 km) |
| Petrila to On Top of the World Designated Place (Florida) | 5,499.04 mi (8,849.86 km) |
| Petrila to Onalaska (Wisconsin) | 5,081.09 mi (8,177.23 km) |
| Petrila to Oneida (New York) | 4,564.08 mi (7,345.18 km) |
| Petrila to Oneonta (New York) | 4,569.18 mi (7,353.38 km) |
| Petrila to Ontario (California) | 6,428.45 mi (10,345.60 km) |
| Petrila to Ontario (Oregon) | 5,795.46 mi (9,326.89 km) |
| Petrila to Opa-locka (Florida) | 5,573.91 mi (8,970.33 km) |
| Petrila to Opelika (Alabama) | 5,444.33 mi (8,761.80 km) |
| Petrila to Opelousas (Louisiana) | 5,814.75 mi (9,357.93 km) |
| Petrila to Orange (California) | 6,448.50 mi (10,377.87 km) |
| Petrila to Orange (Texas) | 5,899.54 mi (9,494.39 km) |
| Petrila to Orange City (Florida) | 5,466.05 mi (8,796.76 km) |
| Petrila to Orangeburg (South Carolina) | 5,222.68 mi (8,405.09 km) |
