| Dubnica nad Vahom to Olympia Heights (Florida) | 5,259.68 mi (8,464.64 km) |
| Dubnica nad Vahom to Omaha (Nebraska) | 5,033.27 mi (8,100.27 km) |
| Dubnica nad Vahom to On Top of the World Designated Place (Florida) | 5,165.94 mi (8,313.77 km) |
| Dubnica nad Vahom to Onalaska (Wisconsin) | 4,735.61 mi (7,621.23 km) |
| Dubnica nad Vahom to Oneida (New York) | 4,222.62 mi (6,795.65 km) |
| Dubnica nad Vahom to Oneonta (New York) | 4,228.53 mi (6,805.15 km) |
| Dubnica nad Vahom to Ontario (California) | 6,090.58 mi (9,801.84 km) |
| Dubnica nad Vahom to Ontario (Oregon) | 5,463.64 mi (8,792.88 km) |
| Dubnica nad Vahom to Opa-locka (Florida) | 5,247.18 mi (8,444.52 km) |
| Dubnica nad Vahom to Opelika (Alabama) | 5,105.08 mi (8,215.84 km) |
| Dubnica nad Vahom to Opelousas (Louisiana) | 5,472.55 mi (8,807.21 km) |
| Dubnica nad Vahom to Orange (California) | 6,110.70 mi (9,834.22 km) |
| Dubnica nad Vahom to Orange (Texas) | 5,556.64 mi (8,942.55 km) |
| Dubnica nad Vahom to Orange City (Florida) | 5,134.22 mi (8,262.73 km) |
| Dubnica nad Vahom to Orangeburg (South Carolina) | 4,886.30 mi (7,863.74 km) |
