| Trancoso to Oberkirch | 925.68 mi (1,489.73 km) |
| Trancoso to Obernburg am Main | 1,012.91 mi (1,630.12 km) |
| Trancoso to Obernkirchen | 1,109.61 mi (1,785.74 km) |
| Trancoso to Oberschleissheim | 1,061.14 mi (1,707.74 km) |
| Trancoso to Oberstdorf | 984.20 mi (1,583.92 km) |
| Trancoso to Obertraubling | 1,105.55 mi (1,779.21 km) |
| Trancoso to Obertshausen | 1,009.79 mi (1,625.11 km) |
| Trancoso to Oberursel | 1,005.59 mi (1,618.34 km) |
| Trancoso to Ochsenfurt | 1,041.78 mi (1,676.58 km) |
| Trancoso to Ochsenhausen | 987.72 mi (1,589.58 km) |
| Trancoso to Ochtrup | 1,045.44 mi (1,682.48 km) |
| Trancoso to Odenthal | 989.20 mi (1,591.97 km) |
| Trancoso to Oelde | 1,058.85 mi (1,704.05 km) |
| Trancoso to Oelsnitz | 1,148.96 mi (1,849.07 km) |
| Trancoso to Oer-Erkenschwick | 1,021.09 mi (1,643.29 km) |
