| Mount Vernon to Oberkirch | 3,859.83 mi (6,211.79 km) |
| Mount Vernon to Obernburg am Main | 3,864.58 mi (6,219.44 km) |
| Mount Vernon to Obernkirchen | 3,794.50 mi (6,106.66 km) |
| Mount Vernon to Oberschleissheim | 4,011.69 mi (6,456.20 km) |
| Mount Vernon to Oberstdorf | 3,985.26 mi (6,413.66 km) |
| Mount Vernon to Obertraubling | 4,013.29 mi (6,458.76 km) |
| Mount Vernon to Obertshausen | 3,845.55 mi (6,188.82 km) |
| Mount Vernon to Oberursel | 3,831.30 mi (6,165.87 km) |
| Mount Vernon to Ochsenfurt | 3,907.53 mi (6,288.56 km) |
| Mount Vernon to Ochsenhausen | 3,950.83 mi (6,358.24 km) |
| Mount Vernon to Ochtrup | 3,721.07 mi (5,988.49 km) |
| Mount Vernon to Odenthal | 3,749.55 mi (6,034.32 km) |
| Mount Vernon to Oelde | 3,768.67 mi (6,065.08 km) |
| Mount Vernon to Oelsnitz | 3,967.83 mi (6,385.61 km) |
| Mount Vernon to Oer-Erkenschwick | 3,738.44 mi (6,016.43 km) |
