| Cernavoda to Olympia Heights (Florida) | 5,820.86 mi (9,367.77 km) |
| Cernavoda to Omaha (Nebraska) | 5,583.81 mi (8,986.27 km) |
| Cernavoda to On Top of the World Designated Place (Florida) | 5,730.45 mi (9,222.26 km) |
| Cernavoda to Onalaska (Wisconsin) | 5,288.61 mi (8,511.20 km) |
| Cernavoda to Oneida (New York) | 4,787.49 mi (7,704.72 km) |
| Cernavoda to Oneonta (New York) | 4,793.75 mi (7,714.80 km) |
| Cernavoda to Ontario (California) | 6,607.17 mi (10,633.20 km) |
| Cernavoda to Ontario (Oregon) | 5,963.26 mi (9,596.93 km) |
| Cernavoda to Opa-locka (Florida) | 5,808.43 mi (9,347.77 km) |
| Cernavoda to Opelika (Alabama) | 5,670.61 mi (9,125.96 km) |
| Cernavoda to Opelousas (Louisiana) | 6,036.80 mi (9,715.29 km) |
| Cernavoda to Orange (California) | 6,627.04 mi (10,665.19 km) |
| Cernavoda to Orange (Texas) | 6,120.22 mi (9,849.55 km) |
| Cernavoda to Orange City (Florida) | 5,698.21 mi (9,170.38 km) |
| Cernavoda to Orangeburg (South Carolina) | 5,451.72 mi (8,773.70 km) |
