| Trier to Olympia Heights (Florida) | 4,752.18 mi (7,647.89 km) |
| Trier to Omaha (Nebraska) | 4,603.56 mi (7,408.72 km) |
| Trier to On Top of the World Designated Place (Florida) | 4,667.36 mi (7,511.39 km) |
| Trier to Onalaska (Wisconsin) | 4,301.19 mi (6,922.10 km) |
| Trier to Oneida (New York) | 3,746.99 mi (6,030.20 km) |
| Trier to Oneonta (New York) | 3,749.61 mi (6,034.41 km) |
| Trier to Ontario (California) | 5,718.28 mi (9,202.68 km) |
| Trier to Ontario (Oregon) | 5,122.49 mi (8,243.84 km) |
| Trier to Opa-locka (Florida) | 4,739.81 mi (7,627.99 km) |
| Trier to Opelika (Alabama) | 4,620.44 mi (7,435.87 km) |
| Trier to Opelousas (Louisiana) | 4,998.49 mi (8,044.29 km) |
| Trier to Orange (California) | 5,738.64 mi (9,235.45 km) |
| Trier to Orange (Texas) | 5,085.95 mi (8,185.05 km) |
| Trier to Orange City (Florida) | 4,633.57 mi (7,457.01 km) |
| Trier to Orangeburg (South Carolina) | 4,394.32 mi (7,071.97 km) |
