| Knowle to Orbetello | 913.10 mi (1,469.49 km) |
| Knowle to Oria | 1,227.70 mi (1,975.79 km) |
| Knowle to Oristano | 991.74 mi (1,596.05 km) |
| Knowle to Orta Nova | 1,118.35 mi (1,799.81 km) |
| Knowle to Orte | 948.63 mi (1,526.67 km) |
| Knowle to Ortona | 1,020.89 mi (1,642.97 km) |
| Knowle to Orvieto | 925.95 mi (1,490.17 km) |
| Knowle to Orzinuovi | 715.29 mi (1,151.15 km) |
| Knowle to Osimo | 931.83 mi (1,499.64 km) |
| Knowle to Ospitaletto | 712.24 mi (1,146.24 km) |
| Knowle to Ostuni | 1,213.93 mi (1,953.63 km) |
| Knowle to Ottaviano | 1,102.92 mi (1,774.98 km) |
| Knowle to Ovada | 714.34 mi (1,149.61 km) |
| Knowle to Ozieri | 959.94 mi (1,544.87 km) |
| Knowle to Paceco | 1,209.42 mi (1,946.37 km) |
