| Manassas Park to Oberkirch | 4,101.97 mi (6,601.48 km) |
| Manassas Park to Obernburg am Main | 4,106.47 mi (6,608.73 km) |
| Manassas Park to Obernkirchen | 4,035.59 mi (6,494.65 km) |
| Manassas Park to Oberschleissheim | 4,253.73 mi (6,845.72 km) |
| Manassas Park to Oberstdorf | 4,227.43 mi (6,803.39 km) |
| Manassas Park to Obertraubling | 4,255.15 mi (6,848.00 km) |
| Manassas Park to Obertshausen | 4,087.41 mi (6,578.05 km) |
| Manassas Park to Oberursel | 4,073.14 mi (6,555.08 km) |
| Manassas Park to Ochsenfurt | 4,149.39 mi (6,677.80 km) |
| Manassas Park to Ochsenhausen | 4,192.95 mi (6,747.91 km) |
| Manassas Park to Ochtrup | 3,962.40 mi (6,376.86 km) |
| Manassas Park to Odenthal | 3,991.29 mi (6,423.35 km) |
| Manassas Park to Oelde | 4,010.04 mi (6,453.53 km) |
| Manassas Park to Oelsnitz | 4,209.29 mi (6,774.20 km) |
| Manassas Park to Oer-Erkenschwick | 3,979.96 mi (6,405.13 km) |
