| Cities | Distance |
|---|---|
| Trecastagni to Orbetello | 391.01 mi (629.27 km) |
| Trecastagni to Oria | 241.64 mi (388.89 km) |
| Trecastagni to Oristano | 383.72 mi (617.54 km) |
| Trecastagni to Orta Nova | 258.79 mi (416.49 km) |
| Trecastagni to Orte | 363.75 mi (585.40 km) |
| Trecastagni to Ortona | 329.03 mi (529.52 km) |
| Trecastagni to Orvieto | 385.79 mi (620.87 km) |
| Trecastagni to Orzinuovi | 599.85 mi (965.36 km) |
| Trecastagni to Osimo | 413.93 mi (666.16 km) |
| Trecastagni to Ospitaletto | 606.23 mi (975.63 km) |
| Trecastagni to Ostuni | 253.55 mi (408.04 km) |
| Trecastagni to Ottaviano | 225.74 mi (363.29 km) |
| Trecastagni to Ovada | 589.19 mi (948.20 km) |
| Trecastagni to Ozieri | 385.00 mi (619.60 km) |
| Trecastagni to Paceco | 140.60 mi (226.27 km) |