| Illertissen to Obernburg am Main | 120.00 mi (193.12 km) |
| Illertissen to Obernkirchen | 283.03 mi (455.50 km) |
| Illertissen to Oberschleissheim | 68.31 mi (109.93 km) |
| Illertissen to Oberstdorf | 56.49 mi (90.92 km) |
| Illertissen to Obertraubling | 108.37 mi (174.41 km) |
| Illertissen to Obertshausen | 139.75 mi (224.90 km) |
| Illertissen to Oberursel | 153.17 mi (246.51 km) |
| Illertissen to Ochsenfurt | 99.03 mi (159.38 km) |
| Illertissen to Ochsenhausen | 11.77 mi (18.94 km) |
| Illertissen to Ochtrup | 303.78 mi (488.89 km) |
| Illertissen to Odenthal | 235.55 mi (379.07 km) |
| Illertissen to Oelde | 264.18 mi (425.16 km) |
| Illertissen to Oelsnitz | 178.62 mi (287.46 km) |
| Illertissen to Oer-Erkenschwick | 268.07 mi (431.42 km) |
| Illertissen to Oerlinghausen | 266.59 mi (429.03 km) |
