| Granbury to Olympia Heights (Florida) | 1,148.52 mi (1,848.36 km) |
| Granbury to Omaha (Nebraska) | 616.39 mi (991.98 km) |
| Granbury to On Top of the World Designated Place (Florida) | 946.73 mi (1,523.62 km) |
| Granbury to Onalaska (Wisconsin) | 866.42 mi (1,394.37 km) |
| Granbury to Oneida (New York) | 1,406.79 mi (2,264.02 km) |
| Granbury to Oneonta (New York) | 1,417.91 mi (2,281.90 km) |
| Granbury to Ontario (California) | 1,149.71 mi (1,850.28 km) |
| Granbury to Ontario (Oregon) | 1,308.37 mi (2,105.62 km) |
| Granbury to Opa-locka (Florida) | 1,147.51 mi (1,846.73 km) |
| Granbury to Opelika (Alabama) | 721.50 mi (1,161.14 km) |
| Granbury to Opelousas (Louisiana) | 360.46 mi (580.11 km) |
| Granbury to Orange (California) | 1,162.20 mi (1,870.38 km) |
| Granbury to Orange (Texas) | 286.06 mi (460.37 km) |
| Granbury to Orange City (Florida) | 1,007.75 mi (1,621.82 km) |
| Granbury to Orangeburg (South Carolina) | 981.38 mi (1,579.38 km) |
