| Guyancourt to Marco de Canavezes | 723.04 mi (1,163.62 km) |
| Guyancourt to Marinha Grande | 826.06 mi (1,329.42 km) |
| Guyancourt to Massama | 892.13 mi (1,435.74 km) |
| Guyancourt to Matosinhos | 741.71 mi (1,193.67 km) |
| Guyancourt to Mealhada | 775.82 mi (1,248.57 km) |
| Guyancourt to Melgaco | 679.10 mi (1,092.91 km) |
| Guyancourt to Melres | 737.59 mi (1,187.04 km) |
| Guyancourt to Mira | 782.42 mi (1,259.18 km) |
| Guyancourt to Miranda do Corvo | 787.57 mi (1,267.48 km) |
| Guyancourt to Mirandela | 675.03 mi (1,086.36 km) |
| Guyancourt to Mogadouro | 668.59 mi (1,075.99 km) |
| Guyancourt to Moimenta da Beira | 716.35 mi (1,152.86 km) |
| Guyancourt to Moita | 889.15 mi (1,430.95 km) |
| Guyancourt to Moncao | 688.86 mi (1,108.62 km) |
| Guyancourt to Montalegre | 677.46 mi (1,090.27 km) |
