| Trebaseleghe to Orbetello | 221.17 mi (355.94 km) |
| Trebaseleghe to Oria | 450.14 mi (724.44 km) |
| Trebaseleghe to Oristano | 429.63 mi (691.42 km) |
| Trebaseleghe to Orta Nova | 346.39 mi (557.47 km) |
| Trebaseleghe to Orte | 216.42 mi (348.30 km) |
| Trebaseleghe to Ortona | 252.09 mi (405.70 km) |
| Trebaseleghe to Orvieto | 197.97 mi (318.61 km) |
| Trebaseleghe to Orzinuovi | 103.30 mi (166.24 km) |
| Trebaseleghe to Osimo | 161.35 mi (259.67 km) |
| Trebaseleghe to Ospitaletto | 95.63 mi (153.90 km) |
| Trebaseleghe to Ostuni | 435.74 mi (701.26 km) |
| Trebaseleghe to Ottaviano | 349.09 mi (561.80 km) |
| Trebaseleghe to Ovada | 178.30 mi (286.95 km) |
| Trebaseleghe to Ozieri | 377.96 mi (608.26 km) |
| Trebaseleghe to Paceco | 525.74 mi (846.09 km) |
