| Drexel Hill to Oberkirch | 3,961.96 mi (6,376.16 km) |
| Drexel Hill to Obernburg am Main | 3,966.81 mi (6,383.96 km) |
| Drexel Hill to Obernkirchen | 3,896.68 mi (6,271.10 km) |
| Drexel Hill to Oberschleissheim | 4,113.89 mi (6,620.66 km) |
| Drexel Hill to Oberstdorf | 4,087.36 mi (6,577.97 km) |
| Drexel Hill to Obertraubling | 4,115.51 mi (6,623.28 km) |
| Drexel Hill to Obertshausen | 3,947.78 mi (6,353.34 km) |
| Drexel Hill to Oberursel | 3,933.53 mi (6,330.40 km) |
| Drexel Hill to Ochsenfurt | 4,009.76 mi (6,453.08 km) |
| Drexel Hill to Ochsenhausen | 4,052.97 mi (6,522.63 km) |
| Drexel Hill to Ochtrup | 3,823.28 mi (6,152.98 km) |
| Drexel Hill to Odenthal | 3,851.79 mi (6,198.85 km) |
| Drexel Hill to Oelde | 3,870.88 mi (6,229.58 km) |
| Drexel Hill to Oelsnitz | 4,070.06 mi (6,550.12 km) |
| Drexel Hill to Oer-Erkenschwick | 3,840.67 mi (6,180.95 km) |
