| Trofaiach to Olympia Heights (Florida) | 5,165.49 mi (8,313.05 km) |
| Trofaiach to Omaha (Nebraska) | 5,000.04 mi (8,046.79 km) |
| Trofaiach to On Top of the World Designated Place (Florida) | 5,081.87 mi (8,178.48 km) |
| Trofaiach to Onalaska (Wisconsin) | 4,699.35 mi (7,562.88 km) |
| Trofaiach to Oneida (New York) | 4,158.47 mi (6,692.42 km) |
| Trofaiach to Oneonta (New York) | 4,161.83 mi (6,697.82 km) |
| Trofaiach to Ontario (California) | 6,089.13 mi (9,799.51 km) |
| Trofaiach to Ontario (Oregon) | 5,476.14 mi (8,813.00 km) |
| Trofaiach to Opa-locka (Florida) | 5,153.16 mi (8,293.21 km) |
| Trofaiach to Opelika (Alabama) | 5,033.92 mi (8,101.32 km) |
| Trofaiach to Opelousas (Louisiana) | 5,410.01 mi (8,706.56 km) |
| Trofaiach to Orange (California) | 6,109.39 mi (9,832.11 km) |
| Trofaiach to Orange (Texas) | 5,496.69 mi (8,846.06 km) |
| Trofaiach to Orange City (Florida) | 5,047.98 mi (8,123.94 km) |
| Trofaiach to Orangeburg (South Carolina) | 4,808.64 mi (7,738.75 km) |
