| Mengen to Obernburg am Main | 123.99 mi (199.55 km) |
| Mengen to Obernkirchen | 291.50 mi (469.12 km) |
| Mengen to Oberschleissheim | 104.03 mi (167.42 km) |
| Mengen to Oberstdorf | 62.46 mi (100.52 km) |
| Mengen to Obertraubling | 144.45 mi (232.47 km) |
| Mengen to Obertshausen | 141.16 mi (227.18 km) |
| Mengen to Oberursel | 152.64 mi (245.66 km) |
| Mengen to Ochsenfurt | 115.53 mi (185.93 km) |
| Mengen to Ochsenhausen | 28.58 mi (46.00 km) |
| Mengen to Ochtrup | 302.35 mi (486.58 km) |
| Mengen to Odenthal | 228.76 mi (368.15 km) |
| Mengen to Oelde | 266.63 mi (429.09 km) |
| Mengen to Oelsnitz | 207.64 mi (334.16 km) |
| Mengen to Oer-Erkenschwick | 264.91 mi (426.34 km) |
| Mengen to Oerlinghausen | 272.23 mi (438.12 km) |
