| Chioggia to Olympia Heights (Florida) | 5,098.63 mi (8,205.45 km) |
| Chioggia to Omaha (Nebraska) | 5,005.57 mi (8,055.69 km) |
| Chioggia to On Top of the World Designated Place (Florida) | 5,027.62 mi (8,091.17 km) |
| Chioggia to Onalaska (Wisconsin) | 4,702.26 mi (7,567.56 km) |
| Chioggia to Oneida (New York) | 4,130.63 mi (6,647.60 km) |
| Chioggia to Oneonta (New York) | 4,130.95 mi (6,648.12 km) |
| Chioggia to Ontario (California) | 6,127.23 mi (9,860.82 km) |
| Chioggia to Ontario (Oregon) | 5,530.78 mi (8,900.92 km) |
| Chioggia to Opa-locka (Florida) | 5,086.56 mi (8,186.02 km) |
| Chioggia to Opelika (Alabama) | 4,995.32 mi (8,039.20 km) |
| Chioggia to Opelousas (Louisiana) | 5,380.69 mi (8,659.38 km) |
| Chioggia to Orange (California) | 6,147.59 mi (9,893.59 km) |
| Chioggia to Orange (Texas) | 5,470.18 mi (8,803.41 km) |
| Chioggia to Orange City (Florida) | 4,991.16 mi (8,032.50 km) |
| Chioggia to Orangeburg (South Carolina) | 4,762.81 mi (7,665.01 km) |
