| Camposampiero to Olympia Heights (Florida) | 5,074.60 mi (8,166.77 km) |
| Camposampiero to Omaha (Nebraska) | 4,977.13 mi (8,009.92 km) |
| Camposampiero to On Top of the World Designated Place (Florida) | 5,002.53 mi (8,050.79 km) |
| Camposampiero to Onalaska (Wisconsin) | 4,673.90 mi (7,521.91 km) |
| Camposampiero to Oneida (New York) | 4,103.66 mi (6,604.20 km) |
| Camposampiero to Oneonta (New York) | 4,104.16 mi (6,605.01 km) |
| Camposampiero to Ontario (California) | 6,098.06 mi (9,813.88 km) |
| Camposampiero to Ontario (Oregon) | 5,501.51 mi (8,853.83 km) |
| Camposampiero to Opa-locka (Florida) | 5,062.50 mi (8,147.30 km) |
| Camposampiero to Opelika (Alabama) | 4,969.10 mi (7,996.99 km) |
| Camposampiero to Opelousas (Louisiana) | 5,353.91 mi (8,616.28 km) |
| Camposampiero to Orange (California) | 6,118.42 mi (9,846.65 km) |
| Camposampiero to Orange (Texas) | 5,443.24 mi (8,760.06 km) |
| Camposampiero to Orange City (Florida) | 4,966.27 mi (7,992.44 km) |
| Camposampiero to Orangeburg (South Carolina) | 4,737.06 mi (7,623.57 km) |
