| Struer to Olympia Heights (Florida) | 4,712.97 mi (7,584.79 km) |
| Struer to Omaha (Nebraska) | 4,392.95 mi (7,069.77 km) |
| Struer to On Top of the World Designated Place (Florida) | 4,597.18 mi (7,398.44 km) |
| Struer to Onalaska (Wisconsin) | 4,098.41 mi (6,595.75 km) |
| Struer to Oneida (New York) | 3,622.09 mi (5,829.18 km) |
| Struer to Oneonta (New York) | 3,632.19 mi (5,845.44 km) |
| Struer to Ontario (California) | 5,435.41 mi (8,747.44 km) |
| Struer to Ontario (Oregon) | 4,809.09 mi (7,739.48 km) |
| Struer to Opa-locka (Florida) | 4,700.12 mi (7,564.10 km) |
| Struer to Opelika (Alabama) | 4,512.11 mi (7,261.55 km) |
| Struer to Opelousas (Louisiana) | 4,864.38 mi (7,828.46 km) |
| Struer to Orange (California) | 5,455.51 mi (8,779.80 km) |
| Struer to Orange (Texas) | 4,944.50 mi (7,957.40 km) |
| Struer to Orange City (Florida) | 4,570.24 mi (7,355.09 km) |
| Struer to Orangeburg (South Carolina) | 4,306.25 mi (6,930.24 km) |
