| Serris to Montemor-o-Novo | 891.85 mi (1,435.30 km) |
| Serris to Montemor-o-Velho | 822.75 mi (1,324.09 km) |
| Serris to Montijo | 911.10 mi (1,466.27 km) |
| Serris to Mortagua | 793.48 mi (1,276.98 km) |
| Serris to Moura | 899.43 mi (1,447.49 km) |
| Serris to Murtosa | 791.14 mi (1,273.21 km) |
| Serris to Nazare | 865.98 mi (1,393.66 km) |
| Serris to Nelas | 776.35 mi (1,249.42 km) |
| Serris to Obidos | 882.11 mi (1,419.62 km) |
| Serris to Odemira | 965.84 mi (1,554.38 km) |
| Serris to Odivelas | 914.03 mi (1,470.98 km) |
| Serris to Oeiras | 924.36 mi (1,487.62 km) |
| Serris to Olhao | 976.21 mi (1,571.06 km) |
| Serris to Oliveira de Azemeis | 780.14 mi (1,255.52 km) |
| Serris to Oliveira de Frades | 776.71 mi (1,250.00 km) |
