| Glassboro to Oberkirch | 3,964.69 mi (6,380.55 km) |
| Glassboro to Obernburg am Main | 3,970.14 mi (6,389.32 km) |
| Glassboro to Obernkirchen | 3,900.91 mi (6,277.91 km) |
| Glassboro to Oberschleissheim | 4,116.93 mi (6,625.55 km) |
| Glassboro to Oberstdorf | 4,089.94 mi (6,582.12 km) |
| Glassboro to Obertraubling | 4,118.88 mi (6,628.69 km) |
| Glassboro to Obertshausen | 3,951.17 mi (6,358.79 km) |
| Glassboro to Oberursel | 3,936.93 mi (6,335.88 km) |
| Glassboro to Ochsenfurt | 4,013.12 mi (6,458.49 km) |
| Glassboro to Ochsenhausen | 4,055.75 mi (6,527.10 km) |
| Glassboro to Ochtrup | 3,827.30 mi (6,159.45 km) |
| Glassboro to Odenthal | 3,855.35 mi (6,204.59 km) |
| Glassboro to Oelde | 3,874.85 mi (6,235.98 km) |
| Glassboro to Oelsnitz | 4,073.94 mi (6,556.37 km) |
| Glassboro to Oer-Erkenschwick | 3,844.48 mi (6,187.09 km) |
