| Trentham to Oberkirch | 542.80 mi (873.55 km) |
| Trentham to Obernburg am Main | 533.28 mi (858.24 km) |
| Trentham to Obernkirchen | 476.31 mi (766.55 km) |
| Trentham to Oberschleissheim | 684.01 mi (1,100.81 km) |
| Trentham to Oberstdorf | 670.59 mi (1,079.22 km) |
| Trentham to Obertraubling | 681.58 mi (1,096.90 km) |
| Trentham to Obertshausen | 513.88 mi (827.00 km) |
| Trentham to Oberursel | 499.48 mi (803.84 km) |
| Trentham to Ochsenfurt | 575.90 mi (926.82 km) |
| Trentham to Ochsenhausen | 630.17 mi (1,014.16 km) |
| Trentham to Ochtrup | 396.97 mi (638.86 km) |
| Trentham to Odenthal | 417.45 mi (671.82 km) |
| Trentham to Oelde | 442.47 mi (712.08 km) |
| Trentham to Oelsnitz | 638.40 mi (1,027.41 km) |
| Trentham to Oer-Erkenschwick | 408.88 mi (658.04 km) |
