| Aylesbury to Orbetello | 857.61 mi (1,380.19 km) |
| Aylesbury to Oria | 1,173.20 mi (1,888.08 km) |
| Aylesbury to Oristano | 937.39 mi (1,508.58 km) |
| Aylesbury to Orta Nova | 1,063.54 mi (1,711.60 km) |
| Aylesbury to Orte | 893.29 mi (1,437.61 km) |
| Aylesbury to Ortona | 966.05 mi (1,554.70 km) |
| Aylesbury to Orvieto | 870.61 mi (1,401.11 km) |
| Aylesbury to Orzinuovi | 660.26 mi (1,062.58 km) |
| Aylesbury to Osimo | 877.17 mi (1,411.67 km) |
| Aylesbury to Ospitaletto | 657.35 mi (1,057.90 km) |
| Aylesbury to Ostuni | 1,159.51 mi (1,866.05 km) |
| Aylesbury to Ottaviano | 1,047.65 mi (1,686.03 km) |
| Aylesbury to Ovada | 658.84 mi (1,060.29 km) |
| Aylesbury to Ozieri | 905.15 mi (1,456.70 km) |
| Aylesbury to Paceco | 1,154.11 mi (1,857.37 km) |
