| Luton to Orbetello | 848.61 mi (1,365.70 km) |
| Luton to Oria | 1,161.73 mi (1,869.63 km) |
| Luton to Oristano | 932.10 mi (1,500.07 km) |
| Luton to Orta Nova | 1,052.52 mi (1,693.87 km) |
| Luton to Orte | 883.46 mi (1,421.79 km) |
| Luton to Ortona | 955.09 mi (1,537.07 km) |
| Luton to Orvieto | 860.78 mi (1,385.29 km) |
| Luton to Orzinuovi | 649.67 mi (1,045.54 km) |
| Luton to Osimo | 865.93 mi (1,393.58 km) |
| Luton to Ospitaletto | 646.49 mi (1,040.43 km) |
| Luton to Ostuni | 1,147.94 mi (1,847.43 km) |
| Luton to Ottaviano | 1,037.59 mi (1,669.84 km) |
| Luton to Ovada | 650.08 mi (1,046.20 km) |
| Luton to Ozieri | 899.13 mi (1,447.01 km) |
| Luton to Paceco | 1,146.79 mi (1,845.58 km) |
