| Trapani to Olympia Heights (Florida) | 5,291.57 mi (8,515.96 km) |
| Trapani to Omaha (Nebraska) | 5,349.94 mi (8,609.89 km) |
| Trapani to On Top of the World Designated Place (Florida) | 5,250.89 mi (8,450.49 km) |
| Trapani to Onalaska (Wisconsin) | 5,044.15 mi (8,117.78 km) |
| Trapani to Oneida (New York) | 4,419.41 mi (7,112.35 km) |
| Trapani to Oneonta (New York) | 4,413.61 mi (7,103.02 km) |
| Trapani to Ontario (California) | 6,519.29 mi (10,491.78 km) |
| Trapani to Ontario (Oregon) | 5,949.81 mi (9,575.29 km) |
| Trapani to Opa-locka (Florida) | 5,280.23 mi (8,497.70 km) |
| Trapani to Opelika (Alabama) | 5,253.56 mi (8,454.79 km) |
| Trapani to Opelousas (Louisiana) | 5,655.13 mi (9,101.06 km) |
| Trapani to Orange (California) | 6,539.71 mi (10,524.65 km) |
| Trapani to Orange (Texas) | 5,749.72 mi (9,253.28 km) |
| Trapani to Orange City (Florida) | 5,208.89 mi (8,382.91 km) |
| Trapani to Orangeburg (South Carolina) | 5,007.57 mi (8,058.90 km) |
