| Galveston to Oberkirch | 5,273.58 mi (8,487.00 km) |
| Galveston to Obernburg am Main | 5,271.29 mi (8,483.33 km) |
| Galveston to Obernkirchen | 5,188.82 mi (8,350.60 km) |
| Galveston to Oberschleissheim | 5,421.59 mi (8,725.21 km) |
| Galveston to Oberstdorf | 5,400.29 mi (8,690.93 km) |
| Galveston to Obertraubling | 5,419.14 mi (8,721.26 km) |
| Galveston to Obertshausen | 5,251.69 mi (8,451.78 km) |
| Galveston to Oberursel | 5,237.18 mi (8,428.43 km) |
| Galveston to Ochsenfurt | 5,313.68 mi (8,551.54 km) |
| Galveston to Ochsenhausen | 5,363.83 mi (8,632.24 km) |
| Galveston to Ochtrup | 5,118.90 mi (8,238.07 km) |
| Galveston to Odenthal | 5,153.63 mi (8,293.96 km) |
| Galveston to Oelde | 5,167.00 mi (8,315.48 km) |
| Galveston to Oelsnitz | 5,366.75 mi (8,636.94 km) |
| Galveston to Oer-Erkenschwick | 5,139.20 mi (8,270.75 km) |
