| Kirkby to Orbetello | 1,000.15 mi (1,609.58 km) |
| Kirkby to Oria | 1,310.24 mi (2,108.62 km) |
| Kirkby to Oristano | 1,081.25 mi (1,740.11 km) |
| Kirkby to Orta Nova | 1,201.98 mi (1,934.40 km) |
| Kirkby to Orte | 1,034.51 mi (1,664.88 km) |
| Kirkby to Ortona | 1,104.68 mi (1,777.82 km) |
| Kirkby to Orvieto | 1,011.83 mi (1,628.38 km) |
| Kirkby to Orzinuovi | 799.99 mi (1,287.45 km) |
| Kirkby to Osimo | 1,015.07 mi (1,633.59 km) |
| Kirkby to Ospitaletto | 796.45 mi (1,281.76 km) |
| Kirkby to Ostuni | 1,296.22 mi (2,086.07 km) |
| Kirkby to Ottaviano | 1,188.38 mi (1,912.52 km) |
| Kirkby to Ovada | 801.69 mi (1,290.19 km) |
| Kirkby to Ozieri | 1,049.28 mi (1,688.66 km) |
| Kirkby to Paceco | 1,298.11 mi (2,089.11 km) |
