| Tondela to Oberkirch | 966.89 mi (1,556.06 km) |
| Tondela to Obernburg am Main | 1,053.46 mi (1,695.39 km) |
| Tondela to Obernkirchen | 1,148.13 mi (1,847.74 km) |
| Tondela to Oberschleissheim | 1,103.14 mi (1,775.33 km) |
| Tondela to Oberstdorf | 1,026.41 mi (1,651.84 km) |
| Tondela to Obertraubling | 1,147.29 mi (1,846.38 km) |
| Tondela to Obertshausen | 1,050.07 mi (1,689.93 km) |
| Tondela to Oberursel | 1,045.67 mi (1,682.85 km) |
| Tondela to Ochsenfurt | 1,082.72 mi (1,742.46 km) |
| Tondela to Ochsenhausen | 1,029.58 mi (1,656.96 km) |
| Tondela to Ochtrup | 1,083.08 mi (1,743.06 km) |
| Tondela to Odenthal | 1,027.93 mi (1,654.30 km) |
| Tondela to Oelde | 1,097.32 mi (1,765.97 km) |
| Tondela to Oelsnitz | 1,189.87 mi (1,914.92 km) |
| Tondela to Oer-Erkenschwick | 1,059.31 mi (1,704.79 km) |
