| Horwich to Orbetello | 995.34 mi (1,601.85 km) |
| Horwich to Oria | 1,302.99 mi (2,096.95 km) |
| Horwich to Oristano | 1,079.65 mi (1,737.53 km) |
| Horwich to Orta Nova | 1,195.22 mi (1,923.52 km) |
| Horwich to Orte | 1,028.94 mi (1,655.92 km) |
| Horwich to Ortona | 1,098.03 mi (1,767.10 km) |
| Horwich to Orvieto | 1,006.27 mi (1,619.43 km) |
| Horwich to Orzinuovi | 793.88 mi (1,277.63 km) |
| Horwich to Osimo | 1,008.19 mi (1,622.53 km) |
| Horwich to Ospitaletto | 790.11 mi (1,271.57 km) |
| Horwich to Ostuni | 1,288.88 mi (2,074.25 km) |
| Horwich to Ottaviano | 1,182.54 mi (1,903.11 km) |
| Horwich to Ovada | 797.18 mi (1,282.94 km) |
| Horwich to Ozieri | 1,047.06 mi (1,685.09 km) |
| Horwich to Paceco | 1,294.76 mi (2,083.71 km) |
