| Sieradz to Montemor-o-Novo | 1,575.76 mi (2,535.94 km) |
| Sieradz to Montemor-o-Velho | 1,524.32 mi (2,453.16 km) |
| Sieradz to Montijo | 1,601.08 mi (2,576.69 km) |
| Sieradz to Mortagua | 1,494.32 mi (2,404.88 km) |
| Sieradz to Moura | 1,570.78 mi (2,527.92 km) |
| Sieradz to Murtosa | 1,497.22 mi (2,409.55 km) |
| Sieradz to Nazare | 1,565.29 mi (2,519.09 km) |
| Sieradz to Nelas | 1,475.21 mi (2,374.12 km) |
| Sieradz to Obidos | 1,579.98 mi (2,542.74 km) |
| Sieradz to Odemira | 1,643.34 mi (2,644.70 km) |
| Sieradz to Odivelas | 1,607.14 mi (2,586.44 km) |
| Sieradz to Oeiras | 1,617.58 mi (2,603.24 km) |
| Sieradz to Olhao | 1,640.40 mi (2,639.96 km) |
| Sieradz to Oliveira de Azemeis | 1,486.15 mi (2,391.72 km) |
| Sieradz to Oliveira de Frades | 1,479.76 mi (2,381.44 km) |
