| Oldsmar to Oberkirch | 4,825.25 mi (7,765.49 km) |
| Oldsmar to Obernburg am Main | 4,839.15 mi (7,787.86 km) |
| Oldsmar to Obernkirchen | 4,781.47 mi (7,695.03 km) |
| Oldsmar to Oberschleissheim | 4,981.36 mi (8,016.72 km) |
| Oldsmar to Oberstdorf | 4,947.80 mi (7,962.71 km) |
| Oldsmar to Obertraubling | 4,987.82 mi (8,027.13 km) |
| Oldsmar to Obertshausen | 4,820.91 mi (7,758.51 km) |
| Oldsmar to Oberursel | 4,807.03 mi (7,736.17 km) |
| Oldsmar to Ochsenfurt | 4,882.44 mi (7,857.53 km) |
| Oldsmar to Ochsenhausen | 4,916.68 mi (7,912.63 km) |
| Oldsmar to Ochtrup | 4,705.54 mi (7,572.84 km) |
| Oldsmar to Odenthal | 4,727.82 mi (7,608.68 km) |
| Oldsmar to Oelde | 4,752.38 mi (7,648.22 km) |
| Oldsmar to Oelsnitz | 4,949.75 mi (7,965.85 km) |
| Oldsmar to Oer-Erkenschwick | 4,720.10 mi (7,596.26 km) |
