| Santiago do Cacem to Oberkirch | 1,109.53 mi (1,785.62 km) |
| Santiago do Cacem to Obernburg am Main | 1,200.78 mi (1,932.47 km) |
| Santiago do Cacem to Obernkirchen | 1,305.61 mi (2,101.18 km) |
| Santiago do Cacem to Oberschleissheim | 1,236.51 mi (1,989.97 km) |
| Santiago do Cacem to Oberstdorf | 1,156.82 mi (1,861.72 km) |
| Santiago do Cacem to Obertraubling | 1,283.85 mi (2,066.15 km) |
| Santiago do Cacem to Obertshausen | 1,199.16 mi (1,929.86 km) |
| Santiago do Cacem to Oberursel | 1,195.95 mi (1,924.69 km) |
| Santiago do Cacem to Ochsenfurt | 1,227.13 mi (1,974.87 km) |
| Santiago do Cacem to Ochsenhausen | 1,165.11 mi (1,875.06 km) |
| Santiago do Cacem to Ochtrup | 1,243.84 mi (2,001.77 km) |
| Santiago do Cacem to Odenthal | 1,184.81 mi (1,906.76 km) |
| Santiago do Cacem to Oelde | 1,255.07 mi (2,019.84 km) |
| Santiago do Cacem to Oelsnitz | 1,334.15 mi (2,147.11 km) |
| Santiago do Cacem to Oer-Erkenschwick | 1,218.11 mi (1,960.36 km) |
