| Elkridge to Oberkirch | 4,054.36 mi (6,524.86 km) |
| Elkridge to Obernburg am Main | 4,058.93 mi (6,532.21 km) |
| Elkridge to Obernkirchen | 3,988.23 mi (6,418.43 km) |
| Elkridge to Oberschleissheim | 4,206.15 mi (6,769.15 km) |
| Elkridge to Oberstdorf | 4,179.81 mi (6,726.75 km) |
| Elkridge to Obertraubling | 4,207.61 mi (6,771.50 km) |
| Elkridge to Obertshausen | 4,039.88 mi (6,501.55 km) |
| Elkridge to Oberursel | 4,025.61 mi (6,478.59 km) |
| Elkridge to Ochsenfurt | 4,101.86 mi (6,601.30 km) |
| Elkridge to Ochsenhausen | 4,145.35 mi (6,671.29 km) |
| Elkridge to Ochtrup | 3,914.98 mi (6,300.56 km) |
| Elkridge to Odenthal | 3,943.78 mi (6,346.90 km) |
| Elkridge to Oelde | 3,962.61 mi (6,377.21 km) |
| Elkridge to Oelsnitz | 4,161.85 mi (6,697.84 km) |
| Elkridge to Oer-Erkenschwick | 3,932.51 mi (6,328.76 km) |
