| Chelmsford to Montalegre | 787.35 mi (1,267.11 km) |
| Chelmsford to Montemor-o-Novo | 996.37 mi (1,603.50 km) |
| Chelmsford to Montemor-o-Velho | 910.56 mi (1,465.40 km) |
| Chelmsford to Montijo | 1,008.56 mi (1,623.13 km) |
| Chelmsford to Mortagua | 883.76 mi (1,422.27 km) |
| Chelmsford to Moura | 1,014.92 mi (1,633.36 km) |
| Chelmsford to Murtosa | 874.25 mi (1,406.97 km) |
| Chelmsford to Nazare | 954.65 mi (1,536.36 km) |
| Chelmsford to Nelas | 870.11 mi (1,400.30 km) |
| Chelmsford to Obidos | 971.84 mi (1,564.02 km) |
| Chelmsford to Odemira | 1,073.21 mi (1,727.17 km) |
| Chelmsford to Odivelas | 1,007.94 mi (1,622.12 km) |
| Chelmsford to Oeiras | 1,017.72 mi (1,637.87 km) |
| Chelmsford to Olhao | 1,094.19 mi (1,760.93 km) |
| Chelmsford to Oliveira de Azemeis | 863.96 mi (1,390.40 km) |
