| Acqui Terme to Olympia Heights (Florida) | 4,935.16 mi (7,942.38 km) |
| Acqui Terme to Omaha (Nebraska) | 4,888.42 mi (7,867.16 km) |
| Acqui Terme to On Top of the World Designated Place (Florida) | 4,871.04 mi (7,839.19 km) |
| Acqui Terme to Onalaska (Wisconsin) | 4,583.73 mi (7,376.80 km) |
| Acqui Terme to Oneida (New York) | 3,991.54 mi (6,423.76 km) |
| Acqui Terme to Oneonta (New York) | 3,989.87 mi (6,421.08 km) |
| Acqui Terme to Ontario (California) | 6,033.89 mi (9,710.60 km) |
| Acqui Terme to Ontario (Oregon) | 5,453.03 mi (8,775.80 km) |
| Acqui Terme to Opa-locka (Florida) | 4,923.23 mi (7,923.18 km) |
| Acqui Terme to Opelika (Alabama) | 4,848.02 mi (7,802.13 km) |
| Acqui Terme to Opelousas (Louisiana) | 5,238.68 mi (8,430.85 km) |
| Acqui Terme to Orange (California) | 6,054.30 mi (9,743.46 km) |
| Acqui Terme to Orange (Texas) | 5,329.87 mi (8,577.60 km) |
| Acqui Terme to Orange City (Florida) | 4,833.20 mi (7,778.28 km) |
| Acqui Terme to Orangeburg (South Carolina) | 4,611.44 mi (7,421.40 km) |
