| Ilkeston to Oberkirch | 511.75 mi (823.59 km) |
| Ilkeston to Obernburg am Main | 499.04 mi (803.13 km) |
| Ilkeston to Obernkirchen | 439.69 mi (707.61 km) |
| Ilkeston to Oberschleissheim | 650.64 mi (1,047.10 km) |
| Ilkeston to Oberstdorf | 639.37 mi (1,028.97 km) |
| Ilkeston to Obertraubling | 647.04 mi (1,041.31 km) |
| Ilkeston to Obertshausen | 479.45 mi (771.60 km) |
| Ilkeston to Oberursel | 464.98 mi (748.31 km) |
| Ilkeston to Ochsenfurt | 541.46 mi (871.40 km) |
| Ilkeston to Ochsenhausen | 598.19 mi (962.69 km) |
| Ilkeston to Ochtrup | 360.45 mi (580.09 km) |
| Ilkeston to Odenthal | 382.30 mi (615.26 km) |
| Ilkeston to Oelde | 406.10 mi (653.55 km) |
| Ilkeston to Oelsnitz | 602.47 mi (969.59 km) |
| Ilkeston to Oer-Erkenschwick | 372.84 mi (600.03 km) |
