| Petroupoli to Olympia Heights (Florida) | 5,839.81 mi (9,398.27 km) |
| Petroupoli to Omaha (Nebraska) | 5,771.43 mi (9,288.22 km) |
| Petroupoli to On Top of the World Designated Place (Florida) | 5,780.65 mi (9,303.06 km) |
| Petroupoli to Onalaska (Wisconsin) | 5,468.86 mi (8,801.28 km) |
| Petroupoli to Oneida (New York) | 4,898.08 mi (7,882.69 km) |
| Petroupoli to Oneonta (New York) | 4,897.60 mi (7,881.92 km) |
| Petroupoli to Ontario (California) | 6,872.29 mi (11,059.89 km) |
| Petroupoli to Ontario (Oregon) | 6,257.24 mi (10,070.05 km) |
| Petroupoli to Opa-locka (Florida) | 5,828.04 mi (9,379.32 km) |
| Petroupoli to Opelika (Alabama) | 5,758.32 mi (9,267.12 km) |
| Petroupoli to Opelousas (Louisiana) | 6,147.09 mi (9,892.78 km) |
| Petroupoli to Orange (California) | 6,892.55 mi (11,092.50 km) |
| Petroupoli to Orange (Texas) | 6,237.36 mi (10,038.06 km) |
| Petroupoli to Orange City (Florida) | 5,742.17 mi (9,241.13 km) |
| Petroupoli to Orangeburg (South Carolina) | 5,522.16 mi (8,887.05 km) |
