| Greensboro to Oberkirch | 4,321.80 mi (6,955.26 km) |
| Greensboro to Obernburg am Main | 4,327.80 mi (6,964.93 km) |
| Greensboro to Obernkirchen | 4,258.81 mi (6,853.90 km) |
| Greensboro to Oberschleissheim | 4,474.35 mi (7,200.78 km) |
| Greensboro to Oberstdorf | 4,446.85 mi (7,156.52 km) |
| Greensboro to Obertraubling | 4,476.56 mi (7,204.32 km) |
| Greensboro to Obertshausen | 4,308.86 mi (6,934.44 km) |
| Greensboro to Oberursel | 4,294.64 mi (6,911.55 km) |
| Greensboro to Ochsenfurt | 4,370.80 mi (7,034.13 km) |
| Greensboro to Ochsenhausen | 4,412.91 mi (7,101.90 km) |
| Greensboro to Ochtrup | 4,185.21 mi (6,735.45 km) |
| Greensboro to Odenthal | 4,213.15 mi (6,780.40 km) |
| Greensboro to Oelde | 4,232.76 mi (6,811.97 km) |
| Greensboro to Oelsnitz | 4,431.83 mi (7,132.34 km) |
| Greensboro to Oer-Erkenschwick | 4,202.36 mi (6,763.04 km) |
