| Santa Iria da Azoia to Oerlinghausen | 1,243.89 mi (2,001.84 km) |
| Santa Iria da Azoia to Oestrich-Winkel | 1,137.36 mi (1,830.41 km) |
| Santa Iria da Azoia to Offenburg | 1,075.60 mi (1,731.00 km) |
| Santa Iria da Azoia to Oftersheim | 1,134.12 mi (1,825.19 km) |
| Santa Iria da Azoia to Ohrdruf | 1,268.89 mi (2,042.08 km) |
| Santa Iria da Azoia to Ohringen | 1,162.81 mi (1,871.36 km) |
| Santa Iria da Azoia to Olbernhau | 1,361.06 mi (2,190.42 km) |
| Santa Iria da Azoia to Olching | 1,203.67 mi (1,937.12 km) |
| Santa Iria da Azoia to Oldenburg | 1,283.65 mi (2,065.83 km) |
| Santa Iria da Azoia to Oldenburg in Holstein | 1,418.18 mi (2,282.34 km) |
| Santa Iria da Azoia to Olfen | 1,191.13 mi (1,916.94 km) |
| Santa Iria da Azoia to Olpe | 1,174.48 mi (1,890.14 km) |
| Santa Iria da Azoia to Olsberg | 1,210.85 mi (1,948.67 km) |
| Santa Iria da Azoia to Oranienburg | 1,431.28 mi (2,303.42 km) |
| Santa Iria da Azoia to Ortenberg | 1,189.64 mi (1,914.55 km) |
