| Estremoz to Oerlinghausen | 1,195.58 mi (1,924.10 km) |
| Estremoz to Oestrich-Winkel | 1,084.31 mi (1,745.03 km) |
| Estremoz to Offenburg | 1,017.87 mi (1,638.10 km) |
| Estremoz to Oftersheim | 1,078.30 mi (1,735.36 km) |
| Estremoz to Ohrdruf | 1,214.55 mi (1,954.62 km) |
| Estremoz to Ohringen | 1,105.28 mi (1,778.78 km) |
| Estremoz to Olbernhau | 1,303.50 mi (2,097.78 km) |
| Estremoz to Olching | 1,141.32 mi (1,836.78 km) |
| Estremoz to Oldenburg | 1,239.28 mi (1,994.43 km) |
| Estremoz to Oldenburg in Holstein | 1,372.93 mi (2,209.51 km) |
| Estremoz to Olfen | 1,144.17 mi (1,841.37 km) |
| Estremoz to Olpe | 1,124.74 mi (1,810.10 km) |
| Estremoz to Olsberg | 1,161.07 mi (1,868.56 km) |
| Estremoz to Oranienburg | 1,379.24 mi (2,219.68 km) |
| Estremoz to Ortenberg | 1,136.13 mi (1,828.42 km) |
