| Hohr-Grenzhausen to Olympia Heights (Florida) | 4,783.71 mi (7,698.64 km) |
| Hohr-Grenzhausen to Omaha (Nebraska) | 4,611.61 mi (7,421.68 km) |
| Hohr-Grenzhausen to On Top of the World Designated Place (Florida) | 4,694.97 mi (7,555.83 km) |
| Hohr-Grenzhausen to Onalaska (Wisconsin) | 4,310.15 mi (6,936.51 km) |
| Hohr-Grenzhausen to Oneida (New York) | 3,766.46 mi (6,061.53 km) |
| Hohr-Grenzhausen to Oneonta (New York) | 3,770.09 mi (6,067.38 km) |
| Hohr-Grenzhausen to Ontario (California) | 5,715.51 mi (9,198.23 km) |
| Hohr-Grenzhausen to Ontario (Oregon) | 5,113.92 mi (8,230.06 km) |
| Hohr-Grenzhausen to Opa-locka (Florida) | 4,771.28 mi (7,678.63 km) |
| Hohr-Grenzhausen to Opelika (Alabama) | 4,643.05 mi (7,472.27 km) |
| Hohr-Grenzhausen to Opelousas (Louisiana) | 5,017.96 mi (8,075.62 km) |
| Hohr-Grenzhausen to Orange (California) | 5,735.84 mi (9,230.95 km) |
| Hohr-Grenzhausen to Orange (Texas) | 5,104.48 mi (8,214.86 km) |
| Hohr-Grenzhausen to Orange City (Florida) | 4,662.02 mi (7,502.79 km) |
| Hohr-Grenzhausen to Orangeburg (South Carolina) | 4,419.38 mi (7,112.30 km) |
