| Manassas to Oberkirch | 4,104.68 mi (6,605.84 km) |
| Manassas to Obernburg am Main | 4,109.17 mi (6,613.08 km) |
| Manassas to Obernkirchen | 4,038.28 mi (6,498.98 km) |
| Manassas to Oberschleissheim | 4,256.44 mi (6,850.08 km) |
| Manassas to Oberstdorf | 4,230.14 mi (6,807.75 km) |
| Manassas to Obertraubling | 4,257.85 mi (6,852.35 km) |
| Manassas to Obertshausen | 4,090.11 mi (6,582.40 km) |
| Manassas to Oberursel | 4,075.84 mi (6,559.43 km) |
| Manassas to Ochsenfurt | 4,152.10 mi (6,682.15 km) |
| Manassas to Ochsenhausen | 4,195.66 mi (6,752.27 km) |
| Manassas to Ochtrup | 3,965.09 mi (6,381.19 km) |
| Manassas to Odenthal | 3,993.98 mi (6,427.70 km) |
| Manassas to Oelde | 4,012.73 mi (6,457.86 km) |
| Manassas to Oelsnitz | 4,211.98 mi (6,778.53 km) |
| Manassas to Oer-Erkenschwick | 3,982.66 mi (6,409.47 km) |
