| Monte San Giovanni Campano to Oegstgeest | 843.41 mi (1,357.34 km) |
| Monte San Giovanni Campano to Oirschot | 784.42 mi (1,262.40 km) |
| Monte San Giovanni Campano to Oisterwijk | 791.59 mi (1,273.93 km) |
| Monte San Giovanni Campano to Oldebroek | 827.86 mi (1,332.32 km) |
| Monte San Giovanni Campano to Oldenzaal | 799.93 mi (1,287.37 km) |
| Monte San Giovanni Campano to Ommen | 821.89 mi (1,322.70 km) |
| Monte San Giovanni Campano to Oosterend | 858.52 mi (1,381.66 km) |
| Monte San Giovanni Campano to Oosterhout | 803.15 mi (1,292.54 km) |
| Monte San Giovanni Campano to Oosterwolde | 853.54 mi (1,373.63 km) |
| Monte San Giovanni Campano to Oostzaan | 848.39 mi (1,365.35 km) |
| Monte San Giovanni Campano to Opmeer | 862.66 mi (1,388.31 km) |
| Monte San Giovanni Campano to Oss | 795.08 mi (1,279.55 km) |
| Monte San Giovanni Campano to Oud-Beijerland | 824.10 mi (1,326.27 km) |
| Monte San Giovanni Campano to Oudenbosch | 808.19 mi (1,300.66 km) |
| Monte San Giovanni Campano to Oudewater | 824.46 mi (1,326.84 km) |
