| Plovdiv to Olympia Heights (Florida) | 5,752.56 mi (9,257.85 km) |
| Plovdiv to Omaha (Nebraska) | 5,593.50 mi (9,001.87 km) |
| Plovdiv to On Top of the World Designated Place (Florida) | 5,675.77 mi (9,134.27 km) |
| Plovdiv to Onalaska (Wisconsin) | 5,294.15 mi (8,520.12 km) |
| Plovdiv to Oneida (New York) | 4,758.57 mi (7,658.18 km) |
| Plovdiv to Oneonta (New York) | 4,761.70 mi (7,663.21 km) |
| Plovdiv to Ontario (California) | 6,658.01 mi (10,715.04 km) |
| Plovdiv to Ontario (Oregon) | 6,028.75 mi (9,702.33 km) |
| Plovdiv to Opa-locka (Florida) | 5,740.39 mi (9,238.27 km) |
| Plovdiv to Opelika (Alabama) | 5,632.80 mi (9,065.12 km) |
| Plovdiv to Opelousas (Louisiana) | 6,010.12 mi (9,672.35 km) |
| Plovdiv to Orange (California) | 6,678.12 mi (10,747.40 km) |
| Plovdiv to Orange (Texas) | 6,096.89 mi (9,812.00 km) |
| Plovdiv to Orange City (Florida) | 5,640.69 mi (9,077.81 km) |
| Plovdiv to Orangeburg (South Carolina) | 5,405.62 mi (8,699.50 km) |
