| San Martin de Valdeiglesias to Orbetello | 820.57 mi (1,320.58 km) |
| San Martin de Valdeiglesias to Oria | 1,155.84 mi (1,860.15 km) |
| San Martin de Valdeiglesias to Oristano | 686.43 mi (1,104.70 km) |
| San Martin de Valdeiglesias to Orta Nova | 1,050.95 mi (1,691.35 km) |
| San Martin de Valdeiglesias to Orte | 880.34 mi (1,416.77 km) |
| San Martin de Valdeiglesias to Ortona | 982.60 mi (1,581.34 km) |
| San Martin de Valdeiglesias to Orvieto | 867.76 mi (1,396.52 km) |
| San Martin de Valdeiglesias to Orzinuovi | 803.28 mi (1,292.75 km) |
| San Martin de Valdeiglesias to Osimo | 942.31 mi (1,516.50 km) |
| San Martin de Valdeiglesias to Ospitaletto | 813.43 mi (1,309.09 km) |
| San Martin de Valdeiglesias to Ostuni | 1,151.46 mi (1,853.09 km) |
| San Martin de Valdeiglesias to Ottaviano | 988.93 mi (1,591.52 km) |
| San Martin de Valdeiglesias to Ovada | 726.22 mi (1,168.73 km) |
| San Martin de Valdeiglesias to Ozieri | 704.00 mi (1,132.98 km) |
| San Martin de Valdeiglesias to Paceco | 921.24 mi (1,482.59 km) |
