| Bologna to Olympia Heights (Florida) | 5,072.93 mi (8,164.10 km) |
| Bologna to Omaha (Nebraska) | 5,004.30 mi (8,053.65 km) |
| Bologna to On Top of the World Designated Place (Florida) | 5,006.18 mi (8,056.67 km) |
| Bologna to Onalaska (Wisconsin) | 4,700.31 mi (7,564.42 km) |
| Bologna to Oneida (New York) | 4,118.67 mi (6,628.37 km) |
| Bologna to Oneonta (New York) | 4,117.97 mi (6,627.24 km) |
| Bologna to Ontario (California) | 6,136.38 mi (9,875.55 km) |
| Bologna to Ontario (Oregon) | 5,545.93 mi (8,925.32 km) |
| Bologna to Opa-locka (Florida) | 5,060.95 mi (8,144.81 km) |
| Bologna to Opelika (Alabama) | 4,979.16 mi (8,013.18 km) |
| Bologna to Opelousas (Louisiana) | 5,367.41 mi (8,638.02 km) |
| Bologna to Orange (California) | 6,156.77 mi (9,908.36 km) |
| Bologna to Orange (Texas) | 5,457.81 mi (8,783.49 km) |
| Bologna to Orange City (Florida) | 4,968.89 mi (7,996.65 km) |
| Bologna to Orangeburg (South Carolina) | 4,744.36 mi (7,635.31 km) |
