| Grenzach-Wyhlen to Obernburg am Main | 171.94 mi (276.71 km) |
| Grenzach-Wyhlen to Obernkirchen | 332.14 mi (534.52 km) |
| Grenzach-Wyhlen to Oberschleissheim | 187.30 mi (301.42 km) |
| Grenzach-Wyhlen to Oberstdorf | 122.73 mi (197.52 km) |
| Grenzach-Wyhlen to Obertraubling | 229.17 mi (368.82 km) |
| Grenzach-Wyhlen to Obertshausen | 181.79 mi (292.56 km) |
| Grenzach-Wyhlen to Oberursel | 187.89 mi (302.38 km) |
| Grenzach-Wyhlen to Ochsenfurt | 181.97 mi (292.85 km) |
| Grenzach-Wyhlen to Ochsenhausen | 112.12 mi (180.45 km) |
| Grenzach-Wyhlen to Ochtrup | 322.23 mi (518.58 km) |
| Grenzach-Wyhlen to Odenthal | 241.79 mi (389.13 km) |
| Grenzach-Wyhlen to Oelde | 296.64 mi (477.40 km) |
| Grenzach-Wyhlen to Oelsnitz | 284.44 mi (457.75 km) |
| Grenzach-Wyhlen to Oer-Erkenschwick | 283.22 mi (455.79 km) |
| Grenzach-Wyhlen to Oerlinghausen | 308.34 mi (496.22 km) |
