| Caltanissetta to Olympia Heights (Florida) | 5,383.62 mi (8,664.10 km) |
| Caltanissetta to Omaha (Nebraska) | 5,436.31 mi (8,748.90 km) |
| Caltanissetta to On Top of the World Designated Place (Florida) | 5,342.78 mi (8,598.37 km) |
| Caltanissetta to Onalaska (Wisconsin) | 5,130.63 mi (8,256.96 km) |
| Caltanissetta to Oneida (New York) | 4,509.19 mi (7,256.84 km) |
| Caltanissetta to Oneonta (New York) | 4,503.68 mi (7,247.97 km) |
| Caltanissetta to Ontario (California) | 6,600.76 mi (10,622.90 km) |
| Caltanissetta to Ontario (Oregon) | 6,026.70 mi (9,699.04 km) |
| Caltanissetta to Opa-locka (Florida) | 5,372.27 mi (8,645.84 km) |
| Caltanissetta to Opelika (Alabama) | 5,344.73 mi (8,601.52 km) |
| Caltanissetta to Opelousas (Louisiana) | 5,745.85 mi (9,247.04 km) |
| Caltanissetta to Orange (California) | 6,621.19 mi (10,655.77 km) |
| Caltanissetta to Orange (Texas) | 5,840.25 mi (9,398.97 km) |
| Caltanissetta to Orange City (Florida) | 5,300.84 mi (8,530.88 km) |
| Caltanissetta to Orangeburg (South Carolina) | 5,099.06 mi (8,206.14 km) |
