| Ascoli Piceno to Oegstgeest | 771.23 mi (1,241.17 km) |
| Ascoli Piceno to Oirschot | 712.12 mi (1,146.04 km) |
| Ascoli Piceno to Oisterwijk | 719.30 mi (1,157.60 km) |
| Ascoli Piceno to Oldebroek | 752.57 mi (1,211.15 km) |
| Ascoli Piceno to Oldenzaal | 723.06 mi (1,163.65 km) |
| Ascoli Piceno to Ommen | 745.60 mi (1,199.93 km) |
| Ascoli Piceno to Oosterend | 782.11 mi (1,258.69 km) |
| Ascoli Piceno to Oosterhout | 731.42 mi (1,177.11 km) |
| Ascoli Piceno to Oosterwolde | 776.79 mi (1,250.12 km) |
| Ascoli Piceno to Oostzaan | 774.94 mi (1,247.14 km) |
| Ascoli Piceno to Opmeer | 788.59 mi (1,269.11 km) |
| Ascoli Piceno to Oss | 721.76 mi (1,161.57 km) |
| Ascoli Piceno to Oud-Beijerland | 752.88 mi (1,211.64 km) |
| Ascoli Piceno to Oudenbosch | 737.26 mi (1,186.51 km) |
| Ascoli Piceno to Oudewater | 751.88 mi (1,210.03 km) |
