| Barmstedt to Olympia Heights (Florida) | 4,806.26 mi (7,734.93 km) |
| Barmstedt to Omaha (Nebraska) | 4,541.61 mi (7,309.01 km) |
| Barmstedt to On Top of the World Designated Place (Florida) | 4,701.17 mi (7,565.80 km) |
| Barmstedt to Onalaska (Wisconsin) | 4,244.33 mi (6,830.58 km) |
| Barmstedt to Oneida (New York) | 3,742.63 mi (6,023.18 km) |
| Barmstedt to Oneonta (New York) | 3,750.27 mi (6,035.47 km) |
| Barmstedt to Ontario (California) | 5,604.64 mi (9,019.79 km) |
| Barmstedt to Ontario (Oregon) | 4,984.93 mi (8,022.48 km) |
| Barmstedt to Opa-locka (Florida) | 4,793.56 mi (7,714.49 km) |
| Barmstedt to Opelika (Alabama) | 4,628.93 mi (7,449.55 km) |
| Barmstedt to Opelousas (Louisiana) | 4,990.25 mi (8,031.03 km) |
| Barmstedt to Orange (California) | 5,624.82 mi (9,052.27 km) |
| Barmstedt to Orange (Texas) | 5,072.85 mi (8,163.97 km) |
| Barmstedt to Orange City (Florida) | 4,671.79 mi (7,518.53 km) |
| Barmstedt to Orangeburg (South Carolina) | 4,415.85 mi (7,106.62 km) |
