| Bad Nenndorf to Olympia Heights (Florida) | 4,818.46 mi (7,754.56 km) |
| Bad Nenndorf to Omaha (Nebraska) | 4,589.87 mi (7,386.68 km) |
| Bad Nenndorf to On Top of the World Designated Place (Florida) | 4,719.92 mi (7,595.98 km) |
| Bad Nenndorf to Onalaska (Wisconsin) | 4,290.86 mi (6,905.47 km) |
| Bad Nenndorf to Oneida (New York) | 3,772.69 mi (6,071.56 km) |
| Bad Nenndorf to Oneonta (New York) | 3,778.77 mi (6,081.34 km) |
| Bad Nenndorf to Ontario (California) | 5,668.30 mi (9,122.25 km) |
| Bad Nenndorf to Ontario (Oregon) | 5,054.74 mi (8,134.82 km) |
| Bad Nenndorf to Opa-locka (Florida) | 4,805.86 mi (7,734.29 km) |
| Bad Nenndorf to Opelika (Alabama) | 4,655.73 mi (7,492.67 km) |
| Bad Nenndorf to Opelousas (Louisiana) | 5,022.56 mi (8,083.03 km) |
| Bad Nenndorf to Orange (California) | 5,688.54 mi (9,154.82 km) |
| Bad Nenndorf to Orange (Texas) | 5,106.73 mi (8,218.49 km) |
| Bad Nenndorf to Orange City (Florida) | 4,689.09 mi (7,546.36 km) |
| Bad Nenndorf to Orangeburg (South Carolina) | 4,438.32 mi (7,142.79 km) |
