| Cities | Distance |
|---|---|
| Hamm to Obernburg am Main | 139.90 mi (225.14 km) |
| Hamm to Obernkirchen | 68.48 mi (110.21 km) |
| Hamm to Oberschleissheim | 289.83 mi (466.43 km) |
| Hamm to Oberstdorf | 315.19 mi (507.25 km) |
| Hamm to Obertraubling | 268.38 mi (431.92 km) |
| Hamm to Obertshausen | 120.17 mi (193.39 km) |
| Hamm to Oberursel | 107.48 mi (172.97 km) |
| Hamm to Ochsenfurt | 171.58 mi (276.13 km) |
| Hamm to Ochsenhausen | 266.91 mi (429.55 km) |
| Hamm to Ochtrup | 44.88 mi (72.22 km) |
| Hamm to Odenthal | 54.12 mi (87.10 km) |
| Hamm to Oelde | 17.62 mi (28.36 km) |
| Hamm to Oelsnitz | 208.18 mi (335.03 km) |
| Hamm to Oer-Erkenschwick | 24.42 mi (39.30 km) |
| Hamm to Oerlinghausen | 41.24 mi (66.37 km) |