| Gardelegen to Olympia Heights (Florida) | 4,895.83 mi (7,879.08 km) |
| Gardelegen to Omaha (Nebraska) | 4,648.26 mi (7,480.66 km) |
| Gardelegen to On Top of the World Designated Place (Florida) | 4,794.69 mi (7,716.31 km) |
| Gardelegen to Onalaska (Wisconsin) | 4,350.43 mi (7,001.34 km) |
| Gardelegen to Oneida (New York) | 3,842.05 mi (6,183.19 km) |
| Gardelegen to Oneonta (New York) | 3,848.93 mi (6,194.25 km) |
| Gardelegen to Ontario (California) | 5,714.35 mi (9,196.35 km) |
| Gardelegen to Ontario (Oregon) | 5,094.81 mi (8,199.30 km) |
| Gardelegen to Opa-locka (Florida) | 4,883.19 mi (7,858.73 km) |
| Gardelegen to Opelika (Alabama) | 4,726.83 mi (7,607.09 km) |
| Gardelegen to Opelousas (Louisiana) | 5,090.85 mi (8,192.94 km) |
| Gardelegen to Orange (California) | 5,734.54 mi (9,228.84 km) |
| Gardelegen to Orange (Texas) | 5,174.17 mi (8,327.02 km) |
| Gardelegen to Orange City (Florida) | 4,764.46 mi (7,667.66 km) |
| Gardelegen to Orangeburg (South Carolina) | 4,511.44 mi (7,260.46 km) |
