| Cities | Distance |
|---|---|
| Castellanza to Oria | 564.56 mi (908.56 km) |
| Castellanza to Oristano | 394.89 mi (635.52 km) |
| Castellanza to Orta Nova | 451.74 mi (727.00 km) |
| Castellanza to Orte | 278.41 mi (448.05 km) |
| Castellanza to Ortona | 354.41 mi (570.37 km) |
| Castellanza to Orvieto | 255.72 mi (411.55 km) |
| Castellanza to Orzinuovi | 52.23 mi (84.05 km) |
| Castellanza to Osimo | 269.48 mi (433.69 km) |
| Castellanza to Ospitaletto | 56.89 mi (91.56 km) |
| Castellanza to Ostuni | 551.98 mi (888.33 km) |
| Castellanza to Ottaviano | 432.56 mi (696.13 km) |
| Castellanza to Ovada | 68.66 mi (110.50 km) |
| Castellanza to Ozieri | 347.70 mi (559.57 km) |
| Castellanza to Paceco | 559.76 mi (900.84 km) |
| Castellanza to Pachino | 693.83 mi (1,116.61 km) |