| Catalca to Mangualde | 1,879.12 mi (3,024.16 km) |
| Catalca to Marco de Canavezes | 1,890.16 mi (3,041.91 km) |
| Catalca to Marinha Grande | 1,953.54 mi (3,143.92 km) |
| Catalca to Massama | 1,990.03 mi (3,202.64 km) |
| Catalca to Matosinhos | 1,918.10 mi (3,086.88 km) |
| Catalca to Mealhada | 1,917.88 mi (3,086.53 km) |
| Catalca to Melgaco | 1,883.38 mi (3,031.01 km) |
| Catalca to Melres | 1,904.59 mi (3,065.14 km) |
| Catalca to Mira | 1,931.53 mi (3,108.50 km) |
| Catalca to Miranda do Corvo | 1,916.66 mi (3,084.57 km) |
| Catalca to Mirandela | 1,836.73 mi (2,955.92 km) |
| Catalca to Mogadouro | 1,815.16 mi (2,921.22 km) |
| Catalca to Moimenta da Beira | 1,865.86 mi (3,002.81 km) |
| Catalca to Moita | 1,977.15 mi (3,181.92 km) |
| Catalca to Moncao | 1,894.68 mi (3,049.20 km) |
