| Estremoz to Opwijk | 1,013.36 mi (1,630.85 km) |
| Estremoz to Ostend | 994.81 mi (1,600.99 km) |
| Estremoz to Oud-Heverlee | 1,019.70 mi (1,641.05 km) |
| Estremoz to Oud-Turnhout | 1,054.07 mi (1,696.37 km) |
| Estremoz to Oudenaarde | 991.31 mi (1,595.35 km) |
| Estremoz to Oudenburg | 994.40 mi (1,600.33 km) |
| Estremoz to Oupeye | 1,041.73 mi (1,676.50 km) |
| Estremoz to Overijse | 1,013.30 mi (1,630.75 km) |
| Estremoz to Overpelt | 1,061.07 mi (1,707.63 km) |
| Estremoz to Paal | 1,044.88 mi (1,681.56 km) |
| Estremoz to Peer | 1,057.79 mi (1,702.35 km) |
| Estremoz to Pepinster | 1,039.90 mi (1,673.56 km) |
| Estremoz to Peruwelz | 972.69 mi (1,565.40 km) |
| Estremoz to Perwez | 1,013.02 mi (1,630.30 km) |
| Estremoz to Philippeville | 983.35 mi (1,582.55 km) |
