| Dunstable to Orbetello | 852.16 mi (1,371.43 km) |
| Dunstable to Oria | 1,165.74 mi (1,876.07 km) |
| Dunstable to Oristano | 934.90 mi (1,504.57 km) |
| Dunstable to Orta Nova | 1,056.45 mi (1,700.19 km) |
| Dunstable to Orte | 887.17 mi (1,427.77 km) |
| Dunstable to Ortona | 959.01 mi (1,543.37 km) |
| Dunstable to Orvieto | 864.49 mi (1,391.26 km) |
| Dunstable to Orzinuovi | 653.51 mi (1,051.72 km) |
| Dunstable to Osimo | 869.89 mi (1,399.96 km) |
| Dunstable to Ospitaletto | 650.39 mi (1,046.69 km) |
| Dunstable to Ostuni | 1,151.96 mi (1,853.90 km) |
| Dunstable to Ottaviano | 1,041.35 mi (1,675.89 km) |
| Dunstable to Ovada | 653.58 mi (1,051.84 km) |
| Dunstable to Ozieri | 902.09 mi (1,451.77 km) |
| Dunstable to Paceco | 1,150.02 mi (1,850.78 km) |
