| Santa Iria da Azoia to Orbetello | 1,090.00 mi (1,754.19 km) |
| Santa Iria da Azoia to Oria | 1,420.21 mi (2,285.61 km) |
| Santa Iria da Azoia to Oristano | 945.54 mi (1,521.69 km) |
| Santa Iria da Azoia to Orta Nova | 1,317.52 mi (2,120.34 km) |
| Santa Iria da Azoia to Orte | 1,149.67 mi (1,850.22 km) |
| Santa Iria da Azoia to Ortona | 1,251.56 mi (2,014.20 km) |
| Santa Iria da Azoia to Orvieto | 1,137.54 mi (1,830.70 km) |
| Santa Iria da Azoia to Orzinuovi | 1,071.32 mi (1,724.12 km) |
| Santa Iria da Azoia to Osimo | 1,212.75 mi (1,951.74 km) |
| Santa Iria da Azoia to Ospitaletto | 1,081.15 mi (1,739.94 km) |
| Santa Iria da Azoia to Ostuni | 1,416.53 mi (2,279.68 km) |
| Santa Iria da Azoia to Ottaviano | 1,253.88 mi (2,017.92 km) |
| Santa Iria da Azoia to Ovada | 995.34 mi (1,601.85 km) |
| Santa Iria da Azoia to Ozieri | 967.26 mi (1,556.66 km) |
| Santa Iria da Azoia to Paceco | 1,170.20 mi (1,883.25 km) |
