| Montrose to Orbetello | 1,156.09 mi (1,860.55 km) |
| Montrose to Oria | 1,437.07 mi (2,312.73 km) |
| Montrose to Oristano | 1,263.60 mi (2,033.56 km) |
| Montrose to Orta Nova | 1,335.56 mi (2,149.37 km) |
| Montrose to Orte | 1,182.62 mi (1,903.24 km) |
| Montrose to Ortona | 1,240.38 mi (1,996.20 km) |
| Montrose to Orvieto | 1,160.25 mi (1,867.24 km) |
| Montrose to Orzinuovi | 945.79 mi (1,522.11 km) |
| Montrose to Osimo | 1,149.38 mi (1,849.75 km) |
| Montrose to Ospitaletto | 939.92 mi (1,512.66 km) |
| Montrose to Ostuni | 1,422.03 mi (2,288.54 km) |
| Montrose to Ottaviano | 1,332.11 mi (2,143.83 km) |
| Montrose to Ovada | 962.76 mi (1,549.41 km) |
| Montrose to Ozieri | 1,227.11 mi (1,974.84 km) |
| Montrose to Paceco | 1,465.07 mi (2,357.81 km) |
