| Caldiran to Orbetello | 1,714.99 mi (2,760.00 km) |
| Caldiran to Oria | 1,392.63 mi (2,241.22 km) |
| Caldiran to Oristano | 1,870.90 mi (3,010.93 km) |
| Caldiran to Orta Nova | 1,488.61 mi (2,395.68 km) |
| Caldiran to Orte | 1,655.16 mi (2,663.73 km) |
| Caldiran to Ortona | 1,552.80 mi (2,498.99 km) |
| Caldiran to Orvieto | 1,668.39 mi (2,685.02 km) |
| Caldiran to Orzinuovi | 1,776.02 mi (2,858.23 km) |
| Caldiran to Osimo | 1,598.20 mi (2,572.05 km) |
| Caldiran to Ospitaletto | 1,769.65 mi (2,847.97 km) |
| Caldiran to Ostuni | 1,394.00 mi (2,243.43 km) |
| Caldiran to Ottaviano | 1,555.24 mi (2,502.92 km) |
| Caldiran to Ovada | 1,838.23 mi (2,958.35 km) |
| Caldiran to Ozieri | 1,842.00 mi (2,964.42 km) |
| Caldiran to Paceco | 1,687.92 mi (2,716.44 km) |
