| Marton to Orbetello | 1,007.72 mi (1,621.77 km) |
| Marton to Oria | 1,300.70 mi (2,093.27 km) |
| Marton to Oristano | 1,108.08 mi (1,783.28 km) |
| Marton to Orta Nova | 1,196.08 mi (1,924.90 km) |
| Marton to Orte | 1,037.06 mi (1,668.99 km) |
| Marton to Ortona | 1,099.78 mi (1,769.92 km) |
| Marton to Orvieto | 1,014.52 mi (1,632.71 km) |
| Marton to Orzinuovi | 800.25 mi (1,287.87 km) |
| Marton to Osimo | 1,009.05 mi (1,623.91 km) |
| Marton to Ospitaletto | 795.20 mi (1,279.76 km) |
| Marton to Ostuni | 1,286.07 mi (2,069.73 km) |
| Marton to Ottaviano | 1,188.57 mi (1,912.82 km) |
| Marton to Ovada | 812.17 mi (1,307.07 km) |
| Marton to Ozieri | 1,072.55 mi (1,726.10 km) |
| Marton to Paceco | 1,313.75 mi (2,114.27 km) |
