| Warrington to Orbetello | 986.96 mi (1,588.36 km) |
| Warrington to Oria | 1,296.56 mi (2,086.61 km) |
| Warrington to Oristano | 1,069.17 mi (1,720.66 km) |
| Warrington to Orta Nova | 1,188.37 mi (1,912.50 km) |
| Warrington to Orte | 1,021.14 mi (1,643.36 km) |
| Warrington to Ortona | 1,091.09 mi (1,755.94 km) |
| Warrington to Orvieto | 998.45 mi (1,606.86 km) |
| Warrington to Orzinuovi | 786.49 mi (1,265.74 km) |
| Warrington to Osimo | 1,001.44 mi (1,611.66 km) |
| Warrington to Ospitaletto | 782.91 mi (1,259.97 km) |
| Warrington to Ostuni | 1,282.53 mi (2,064.03 km) |
| Warrington to Ottaviano | 1,174.95 mi (1,890.90 km) |
| Warrington to Ovada | 788.58 mi (1,269.10 km) |
| Warrington to Ozieri | 1,036.95 mi (1,668.81 km) |
| Warrington to Paceco | 1,285.37 mi (2,068.61 km) |
