| Santa Iria da Azoia to Oberkirch | 1,083.86 mi (1,744.30 km) |
| Santa Iria da Azoia to Obernburg am Main | 1,172.76 mi (1,887.38 km) |
| Santa Iria da Azoia to Obernkirchen | 1,271.84 mi (2,046.83 km) |
| Santa Iria da Azoia to Oberschleissheim | 1,215.57 mi (1,956.26 km) |
| Santa Iria da Azoia to Oberstdorf | 1,137.16 mi (1,830.09 km) |
| Santa Iria da Azoia to Obertraubling | 1,261.41 mi (2,030.05 km) |
| Santa Iria da Azoia to Obertshausen | 1,170.18 mi (1,883.22 km) |
| Santa Iria da Azoia to Oberursel | 1,166.31 mi (1,877.00 km) |
| Santa Iria da Azoia to Ochsenfurt | 1,200.67 mi (1,932.29 km) |
| Santa Iria da Azoia to Ochsenhausen | 1,143.04 mi (1,839.54 km) |
| Santa Iria da Azoia to Ochtrup | 1,207.95 mi (1,944.01 km) |
| Santa Iria da Azoia to Odenthal | 1,151.34 mi (1,852.90 km) |
| Santa Iria da Azoia to Oelde | 1,221.11 mi (1,965.18 km) |
| Santa Iria da Azoia to Oelsnitz | 1,307.86 mi (2,104.80 km) |
| Santa Iria da Azoia to Oer-Erkenschwick | 1,183.47 mi (1,904.60 km) |
