| Knaresborough to Orbetello | 986.56 mi (1,587.72 km) |
| Knaresborough to Oria | 1,285.56 mi (2,068.90 km) |
| Knaresborough to Oristano | 1,081.24 mi (1,740.09 km) |
| Knaresborough to Orta Nova | 1,179.59 mi (1,898.36 km) |
| Knaresborough to Orte | 1,017.56 mi (1,637.61 km) |
| Knaresborough to Ortona | 1,082.86 mi (1,742.69 km) |
| Knaresborough to Orvieto | 994.95 mi (1,601.22 km) |
| Knaresborough to Orzinuovi | 781.19 mi (1,257.20 km) |
| Knaresborough to Osimo | 992.42 mi (1,597.15 km) |
| Knaresborough to Ospitaletto | 776.64 mi (1,249.88 km) |
| Knaresborough to Ostuni | 1,271.14 mi (2,045.70 km) |
| Knaresborough to Ottaviano | 1,170.00 mi (1,882.93 km) |
| Knaresborough to Ovada | 789.83 mi (1,271.12 km) |
| Knaresborough to Ozieri | 1,046.69 mi (1,684.49 km) |
| Knaresborough to Paceco | 1,290.33 mi (2,076.59 km) |
