| Bad Mergentheim to Obernburg am Main | 36.52 mi (58.77 km) |
| Bad Mergentheim to Obernkirchen | 193.22 mi (310.96 km) |
| Bad Mergentheim to Oberschleissheim | 118.95 mi (191.43 km) |
| Bad Mergentheim to Oberstdorf | 146.32 mi (235.48 km) |
| Bad Mergentheim to Obertraubling | 114.40 mi (184.11 km) |
| Bad Mergentheim to Obertshausen | 57.16 mi (91.99 km) |
| Bad Mergentheim to Oberursel | 71.91 mi (115.72 km) |
| Bad Mergentheim to Ochsenfurt | 16.97 mi (27.32 km) |
| Bad Mergentheim to Ochsenhausen | 99.00 mi (159.32 km) |
| Bad Mergentheim to Ochtrup | 218.09 mi (350.98 km) |
| Bad Mergentheim to Odenthal | 157.85 mi (254.03 km) |
| Bad Mergentheim to Oelde | 176.07 mi (283.35 km) |
| Bad Mergentheim to Oelsnitz | 124.06 mi (199.65 km) |
| Bad Mergentheim to Oer-Erkenschwick | 184.63 mi (297.13 km) |
| Bad Mergentheim to Oerlinghausen | 177.09 mi (284.99 km) |
