| Blacksburg to Oberkirch | 4,294.58 mi (6,911.46 km) |
| Blacksburg to Obernburg am Main | 4,298.25 mi (6,917.37 km) |
| Blacksburg to Obernkirchen | 4,225.82 mi (6,800.80 km) |
| Blacksburg to Oberschleissheim | 4,445.93 mi (7,155.03 km) |
| Blacksburg to Oberstdorf | 4,420.21 mi (7,113.65 km) |
| Blacksburg to Obertraubling | 4,446.87 mi (7,156.55 km) |
| Blacksburg to Obertshausen | 4,279.12 mi (6,886.58 km) |
| Blacksburg to Oberursel | 4,264.81 mi (6,863.55 km) |
| Blacksburg to Ochsenfurt | 4,341.12 mi (6,986.36 km) |
| Blacksburg to Ochsenhausen | 4,385.50 mi (7,057.78 km) |
| Blacksburg to Ochtrup | 4,153.04 mi (6,683.67 km) |
| Blacksburg to Odenthal | 4,182.71 mi (6,731.43 km) |
| Blacksburg to Oelde | 4,200.76 mi (6,760.47 km) |
| Blacksburg to Oelsnitz | 4,400.15 mi (7,081.36 km) |
| Blacksburg to Oer-Erkenschwick | 4,170.98 mi (6,712.55 km) |
