| Athy to Marco de Canavezes | 817.71 mi (1,315.97 km) |
| Athy to Marinha Grande | 919.54 mi (1,479.85 km) |
| Athy to Massama | 989.56 mi (1,592.55 km) |
| Athy to Matosinhos | 819.81 mi (1,319.36 km) |
| Athy to Mealhada | 873.88 mi (1,406.38 km) |
| Athy to Melgaco | 753.74 mi (1,213.03 km) |
| Athy to Melres | 826.60 mi (1,330.28 km) |
| Athy to Mira | 871.59 mi (1,402.68 km) |
| Athy to Miranda do Corvo | 893.00 mi (1,437.15 km) |
| Athy to Mirandela | 795.09 mi (1,279.57 km) |
| Athy to Mogadouro | 805.64 mi (1,296.55 km) |
| Athy to Moimenta da Beira | 830.49 mi (1,336.54 km) |
| Athy to Moita | 995.49 mi (1,602.08 km) |
| Athy to Moncao | 757.57 mi (1,219.20 km) |
| Athy to Montalegre | 772.60 mi (1,243.38 km) |
