| Trossingen to Oberkirch | 40.57 mi (65.28 km) |
| Trossingen to Obernburg am Main | 124.04 mi (199.63 km) |
| Trossingen to Obernkirchen | 290.34 mi (467.25 km) |
| Trossingen to Oberschleissheim | 135.59 mi (218.21 km) |
| Trossingen to Oberstdorf | 89.13 mi (143.44 km) |
| Trossingen to Obertraubling | 172.87 mi (278.21 km) |
| Trossingen to Obertshausen | 137.86 mi (221.87 km) |
| Trossingen to Oberursel | 147.03 mi (236.63 km) |
| Trossingen to Ochsenfurt | 126.73 mi (203.95 km) |
| Trossingen to Ochsenhausen | 60.57 mi (97.48 km) |
| Trossingen to Ochtrup | 292.43 mi (470.63 km) |
| Trossingen to Odenthal | 215.39 mi (346.64 km) |
| Trossingen to Oelde | 260.53 mi (419.28 km) |
| Trossingen to Oelsnitz | 226.94 mi (365.22 km) |
| Trossingen to Oer-Erkenschwick | 254.02 mi (408.81 km) |
