| Geislingen an der Steige to Olympia Heights (Florida) | 4,912.45 mi (7,905.83 km) |
| Geislingen an der Steige to Omaha (Nebraska) | 4,765.14 mi (7,668.75 km) |
| Geislingen an der Steige to On Top of the World Designated Place (Florida) | 4,829.57 mi (7,772.44 km) |
| Geislingen an der Steige to Onalaska (Wisconsin) | 4,463.12 mi (7,182.69 km) |
| Geislingen an der Steige to Oneida (New York) | 3,910.85 mi (6,293.91 km) |
| Geislingen an der Steige to Oneonta (New York) | 3,913.43 mi (6,298.06 km) |
| Geislingen an der Steige to Ontario (California) | 5,873.23 mi (9,452.06 km) |
| Geislingen an der Steige to Ontario (Oregon) | 5,272.10 mi (8,484.63 km) |
| Geislingen an der Steige to Opa-locka (Florida) | 4,900.13 mi (7,886.00 km) |
| Geislingen an der Steige to Opelika (Alabama) | 4,784.01 mi (7,699.11 km) |
| Geislingen an der Steige to Opelousas (Louisiana) | 5,162.35 mi (8,308.00 km) |
| Geislingen an der Steige to Orange (California) | 5,893.57 mi (9,484.78 km) |
| Geislingen an der Steige to Orange (Texas) | 5,249.82 mi (8,448.77 km) |
| Geislingen an der Steige to Orange City (Florida) | 4,795.44 mi (7,717.51 km) |
| Geislingen an der Steige to Orangeburg (South Carolina) | 4,557.38 mi (7,334.39 km) |
