| Runcorn to Orbetello | 988.89 mi (1,591.46 km) |
| Runcorn to Oria | 1,299.50 mi (2,091.34 km) |
| Runcorn to Oristano | 1,069.74 mi (1,721.58 km) |
| Runcorn to Orta Nova | 1,191.11 mi (1,916.91 km) |
| Runcorn to Orte | 1,023.38 mi (1,646.97 km) |
| Runcorn to Ortona | 1,093.79 mi (1,760.29 km) |
| Runcorn to Orvieto | 1,000.70 mi (1,610.46 km) |
| Runcorn to Orzinuovi | 788.98 mi (1,269.73 km) |
| Runcorn to Osimo | 1,004.23 mi (1,616.15 km) |
| Runcorn to Ospitaletto | 785.49 mi (1,264.13 km) |
| Runcorn to Ostuni | 1,285.51 mi (2,068.83 km) |
| Runcorn to Ottaviano | 1,177.30 mi (1,894.69 km) |
| Runcorn to Ovada | 790.39 mi (1,272.01 km) |
| Runcorn to Ozieri | 1,037.78 mi (1,670.15 km) |
| Runcorn to Paceco | 1,286.68 mi (2,070.71 km) |
