| Santiago do Cacem to Oerlinghausen | 1,277.53 mi (2,055.99 km) |
| Santiago do Cacem to Oestrich-Winkel | 1,167.19 mi (1,878.42 km) |
| Santiago do Cacem to Offenburg | 1,101.27 mi (1,772.32 km) |
| Santiago do Cacem to Oftersheim | 1,161.55 mi (1,869.33 km) |
| Santiago do Cacem to Ohrdruf | 1,297.64 mi (2,088.35 km) |
| Santiago do Cacem to Ohringen | 1,188.68 mi (1,912.99 km) |
| Santiago do Cacem to Olbernhau | 1,386.91 mi (2,232.01 km) |
| Santiago do Cacem to Olching | 1,224.71 mi (1,970.98 km) |
| Santiago do Cacem to Oldenburg | 1,320.18 mi (2,124.62 km) |
| Santiago do Cacem to Oldenburg in Holstein | 1,454.12 mi (2,340.18 km) |
| Santiago do Cacem to Olfen | 1,225.77 mi (1,972.69 km) |
| Santiago do Cacem to Olpe | 1,207.01 mi (1,942.49 km) |
| Santiago do Cacem to Olsberg | 1,243.35 mi (2,000.98 km) |
| Santiago do Cacem to Oranienburg | 1,462.01 mi (2,352.87 km) |
| Santiago do Cacem to Ortenberg | 1,219.09 mi (1,961.94 km) |
