| Horstel to Novi di Modena | 533.36 mi (858.36 km) |
| Horstel to Novi Ligure | 523.69 mi (842.80 km) |
| Horstel to Nuoro | 831.90 mi (1,338.81 km) |
| Horstel to Occhiobello | 541.09 mi (870.80 km) |
| Horstel to Oderzo | 501.82 mi (807.60 km) |
| Horstel to Oggiono | 457.06 mi (735.57 km) |
| Horstel to Olbia | 791.47 mi (1,273.75 km) |
| Horstel to Oleggio | 465.15 mi (748.59 km) |
| Horstel to Olgiate Comasco | 454.37 mi (731.23 km) |
| Horstel to Olgiate Olona | 464.15 mi (746.98 km) |
| Horstel to Omegna | 445.06 mi (716.26 km) |
| Horstel to Opera | 483.39 mi (777.94 km) |
| Horstel to Oppeano | 510.26 mi (821.19 km) |
| Horstel to Orbassano | 503.69 mi (810.61 km) |
| Horstel to Orbetello | 701.70 mi (1,129.27 km) |
