| Ronciglione to Oegstgeest | 773.20 mi (1,244.35 km) |
| Ronciglione to Oirschot | 714.49 mi (1,149.86 km) |
| Ronciglione to Oisterwijk | 721.62 mi (1,161.33 km) |
| Ronciglione to Oldebroek | 760.97 mi (1,224.66 km) |
| Ronciglione to Oldenzaal | 735.19 mi (1,183.17 km) |
| Ronciglione to Ommen | 756.26 mi (1,217.09 km) |
| Ronciglione to Oosterend | 792.95 mi (1,276.13 km) |
| Ronciglione to Oosterhout | 732.64 mi (1,179.07 km) |
| Ronciglione to Oosterwolde | 788.44 mi (1,268.87 km) |
| Ronciglione to Oostzaan | 779.41 mi (1,254.33 km) |
| Ronciglione to Opmeer | 794.28 mi (1,278.27 km) |
| Ronciglione to Oss | 726.10 mi (1,168.55 km) |
| Ronciglione to Oud-Beijerland | 753.09 mi (1,211.99 km) |
| Ronciglione to Oudenbosch | 736.97 mi (1,186.03 km) |
| Ronciglione to Oudewater | 754.67 mi (1,214.53 km) |
