| Ilkeston to Orbetello | 929.13 mi (1,495.30 km) |
| Ilkeston to Oria | 1,236.61 mi (1,990.14 km) |
| Ilkeston to Oristano | 1,016.20 mi (1,635.42 km) |
| Ilkeston to Orta Nova | 1,128.73 mi (1,816.51 km) |
| Ilkeston to Orte | 962.49 mi (1,548.97 km) |
| Ilkeston to Ortona | 1,031.52 mi (1,660.07 km) |
| Ilkeston to Orvieto | 939.81 mi (1,512.48 km) |
| Ilkeston to Orzinuovi | 727.35 mi (1,170.56 km) |
| Ilkeston to Osimo | 941.72 mi (1,515.54 km) |
| Ilkeston to Ospitaletto | 723.58 mi (1,164.49 km) |
| Ilkeston to Ostuni | 1,222.54 mi (1,967.48 km) |
| Ilkeston to Ottaviano | 1,116.03 mi (1,796.08 km) |
| Ilkeston to Ovada | 731.14 mi (1,176.66 km) |
| Ilkeston to Ozieri | 982.88 mi (1,581.79 km) |
| Ilkeston to Paceco | 1,229.43 mi (1,978.57 km) |
