| Schwabisch Gmund to Olympia Heights (Florida) | 4,907.43 mi (7,897.74 km) |
| Schwabisch Gmund to Omaha (Nebraska) | 4,756.39 mi (7,654.67 km) |
| Schwabisch Gmund to On Top of the World Designated Place (Florida) | 4,823.81 mi (7,763.17 km) |
| Schwabisch Gmund to Onalaska (Wisconsin) | 4,454.48 mi (7,168.80 km) |
| Schwabisch Gmund to Oneida (New York) | 3,903.71 mi (6,282.42 km) |
| Schwabisch Gmund to Oneonta (New York) | 3,906.45 mi (6,286.82 km) |
| Schwabisch Gmund to Ontario (California) | 5,863.20 mi (9,435.91 km) |
| Schwabisch Gmund to Ontario (Oregon) | 5,261.51 mi (8,467.57 km) |
| Schwabisch Gmund to Opa-locka (Florida) | 4,895.09 mi (7,877.89 km) |
| Schwabisch Gmund to Opelika (Alabama) | 4,777.39 mi (7,688.47 km) |
| Schwabisch Gmund to Opelousas (Louisiana) | 5,155.24 mi (8,296.55 km) |
| Schwabisch Gmund to Orange (California) | 5,883.53 mi (9,468.63 km) |
| Schwabisch Gmund to Orange (Texas) | 5,242.56 mi (8,437.09 km) |
| Schwabisch Gmund to Orange City (Florida) | 4,789.83 mi (7,708.48 km) |
| Schwabisch Gmund to Orangeburg (South Carolina) | 4,551.16 mi (7,324.39 km) |
