| Cities | Distance |
|---|---|
| Boom to Oria | 968.20 mi (1,558.17 km) |
| Boom to Oristano | 798.59 mi (1,285.21 km) |
| Boom to Orta Nova | 863.01 mi (1,388.87 km) |
| Boom to Orte | 705.45 mi (1,135.32 km) |
| Boom to Ortona | 766.67 mi (1,233.83 km) |
| Boom to Orvieto | 683.02 mi (1,099.22 km) |
| Boom to Orzinuovi | 468.53 mi (754.03 km) |
| Boom to Osimo | 675.95 mi (1,087.84 km) |
| Boom to Ospitaletto | 462.97 mi (745.08 km) |
| Boom to Ostuni | 953.72 mi (1,534.86 km) |
| Boom to Ottaviano | 856.00 mi (1,377.61 km) |
| Boom to Ovada | 487.24 mi (784.13 km) |
| Boom to Ozieri | 758.54 mi (1,220.75 km) |
| Boom to Paceco | 989.34 mi (1,592.18 km) |
| Boom to Pachino | 1,124.63 mi (1,809.92 km) |