| Callaway to Mangualde | 4,301.36 mi (6,922.37 km) |
| Callaway to Marco de Canavezes | 4,270.25 mi (6,872.30 km) |
| Callaway to Marinha Grande | 4,259.62 mi (6,855.19 km) |
| Callaway to Massama | 4,262.48 mi (6,859.80 km) |
| Callaway to Matosinhos | 4,242.84 mi (6,828.18 km) |
| Callaway to Mealhada | 4,271.25 mi (6,873.91 km) |
| Callaway to Melgaco | 4,246.20 mi (6,833.60 km) |
| Callaway to Melres | 4,260.10 mi (6,855.96 km) |
| Callaway to Mira | 4,255.98 mi (6,849.35 km) |
| Callaway to Miranda do Corvo | 4,282.88 mi (6,892.63 km) |
| Callaway to Mirandela | 4,312.24 mi (6,939.88 km) |
| Callaway to Mogadouro | 4,338.37 mi (6,981.92 km) |
| Callaway to Moimenta da Beira | 4,301.07 mi (6,921.90 km) |
| Callaway to Moita | 4,279.69 mi (6,887.49 km) |
| Callaway to Moncao | 4,236.53 mi (6,818.03 km) |
