| Petrovec to Olympia Heights (Florida) | 5,617.20 mi (9,040.01 km) |
| Petrovec to Omaha (Nebraska) | 5,497.34 mi (8,847.12 km) |
| Petrovec to On Top of the World Designated Place (Florida) | 5,546.35 mi (8,925.99 km) |
| Petrovec to Onalaska (Wisconsin) | 5,196.05 mi (8,362.23 km) |
| Petrovec to Oneida (New York) | 4,642.55 mi (7,471.47 km) |
| Petrovec to Oneonta (New York) | 4,644.08 mi (7,473.93 km) |
| Petrovec to Ontario (California) | 6,585.71 mi (10,598.68 km) |
| Petrovec to Ontario (Oregon) | 5,967.48 mi (9,603.73 km) |
| Petrovec to Opa-locka (Florida) | 5,605.15 mi (9,020.62 km) |
| Petrovec to Opelika (Alabama) | 5,511.28 mi (8,869.55 km) |
| Petrovec to Opelousas (Louisiana) | 5,893.65 mi (9,484.91 km) |
| Petrovec to Orange (California) | 6,605.94 mi (10,631.23 km) |
| Petrovec to Orange (Texas) | 5,982.02 mi (9,627.13 km) |
| Petrovec to Orange City (Florida) | 5,510.04 mi (8,867.56 km) |
| Petrovec to Orangeburg (South Carolina) | 5,280.40 mi (8,497.98 km) |
