| Estremoz to Nuth | 1,059.40 mi (1,704.94 km) |
| Estremoz to Oegstgeest | 1,087.22 mi (1,749.72 km) |
| Estremoz to Oirschot | 1,072.56 mi (1,726.12 km) |
| Estremoz to Oisterwijk | 1,074.18 mi (1,728.72 km) |
| Estremoz to Oldebroek | 1,139.21 mi (1,833.39 km) |
| Estremoz to Oldenzaal | 1,160.94 mi (1,868.35 km) |
| Estremoz to Ommen | 1,156.79 mi (1,861.68 km) |
| Estremoz to Oosterend | 1,173.19 mi (1,888.07 km) |
| Estremoz to Oosterhout | 1,068.00 mi (1,718.78 km) |
| Estremoz to Oosterwolde | 1,178.41 mi (1,896.46 km) |
| Estremoz to Oostzaan | 1,111.62 mi (1,788.97 km) |
| Estremoz to Opmeer | 1,127.99 mi (1,815.33 km) |
| Estremoz to Oss | 1,092.61 mi (1,758.39 km) |
| Estremoz to Oud-Beijerland | 1,065.32 mi (1,714.47 km) |
| Estremoz to Oudenbosch | 1,056.17 mi (1,699.74 km) |
