| Howard to Oberkirch | 4,258.40 mi (6,853.23 km) |
| Howard to Obernburg am Main | 4,243.28 mi (6,828.90 km) |
| Howard to Obernkirchen | 4,144.25 mi (6,669.53 km) |
| Howard to Oberschleissheim | 4,397.25 mi (7,076.69 km) |
| Howard to Oberstdorf | 4,386.24 mi (7,058.97 km) |
| Howard to Obertraubling | 4,388.00 mi (7,061.80 km) |
| Howard to Obertshausen | 4,222.97 mi (6,796.21 km) |
| Howard to Oberursel | 4,208.24 mi (6,772.50 km) |
| Howard to Ochsenfurt | 4,284.25 mi (6,894.83 km) |
| Howard to Ochsenhausen | 4,346.02 mi (6,994.24 km) |
| Howard to Ochtrup | 4,079.63 mi (6,565.53 km) |
| Howard to Odenthal | 4,122.85 mi (6,635.09 km) |
| Howard to Oelde | 4,127.82 mi (6,643.09 km) |
| Howard to Oelsnitz | 4,326.06 mi (6,962.13 km) |
| Howard to Oer-Erkenschwick | 4,103.72 mi (6,604.30 km) |
