| Centennial to Oberkirch | 5,100.71 mi (8,208.80 km) |
| Centennial to Obernburg am Main | 5,074.85 mi (8,167.18 km) |
| Centennial to Obernkirchen | 4,960.90 mi (7,983.80 km) |
| Centennial to Oberschleissheim | 5,230.14 mi (8,417.09 km) |
| Centennial to Oberstdorf | 5,227.90 mi (8,413.49 km) |
| Centennial to Obertraubling | 5,214.82 mi (8,392.45 km) |
| Centennial to Obertshausen | 5,054.16 mi (8,133.89 km) |
| Centennial to Oberursel | 5,039.41 mi (8,110.15 km) |
| Centennial to Ochsenfurt | 5,113.99 mi (8,230.18 km) |
| Centennial to Ochsenhausen | 5,185.12 mi (8,344.65 km) |
| Centennial to Ochtrup | 4,902.65 mi (7,890.06 km) |
| Centennial to Odenthal | 4,953.47 mi (7,971.84 km) |
| Centennial to Oelde | 4,950.29 mi (7,966.72 km) |
| Centennial to Oelsnitz | 5,144.30 mi (8,278.95 km) |
| Centennial to Oer-Erkenschwick | 4,930.15 mi (7,934.31 km) |
