| Alcoa to Oberkirch | 4,506.32 mi (7,252.22 km) |
| Alcoa to Obernburg am Main | 4,508.17 mi (7,255.21 km) |
| Alcoa to Obernkirchen | 4,432.73 mi (7,133.79 km) |
| Alcoa to Oberschleissheim | 4,656.70 mi (7,494.23 km) |
| Alcoa to Oberstdorf | 4,632.33 mi (7,455.01 km) |
| Alcoa to Obertraubling | 4,656.62 mi (7,494.10 km) |
| Alcoa to Obertshausen | 4,488.89 mi (7,224.17 km) |
| Alcoa to Oberursel | 4,474.52 mi (7,201.04 km) |
| Alcoa to Ochsenfurt | 4,550.91 mi (7,323.99 km) |
| Alcoa to Ochsenhausen | 4,597.06 mi (7,398.25 km) |
| Alcoa to Ochtrup | 4,360.75 mi (7,017.95 km) |
| Alcoa to Odenthal | 4,391.95 mi (7,068.15 km) |
| Alcoa to Oelde | 4,408.61 mi (7,094.97 km) |
| Alcoa to Oelsnitz | 4,608.20 mi (7,416.19 km) |
| Alcoa to Oer-Erkenschwick | 4,379.40 mi (7,047.97 km) |
