| Carlow to Marco de Canavezes | 806.76 mi (1,298.36 km) |
| Carlow to Marinha Grande | 908.73 mi (1,462.45 km) |
| Carlow to Massama | 978.80 mi (1,575.22 km) |
| Carlow to Matosinhos | 808.99 mi (1,301.94 km) |
| Carlow to Mealhada | 862.99 mi (1,388.84 km) |
| Carlow to Melgaco | 742.84 mi (1,195.49 km) |
| Carlow to Melres | 815.71 mi (1,312.75 km) |
| Carlow to Mira | 860.75 mi (1,385.25 km) |
| Carlow to Miranda do Corvo | 882.08 mi (1,419.57 km) |
| Carlow to Mirandela | 783.97 mi (1,261.68 km) |
| Carlow to Mogadouro | 794.45 mi (1,278.54 km) |
| Carlow to Moimenta da Beira | 819.44 mi (1,318.76 km) |
| Carlow to Moita | 984.66 mi (1,584.66 km) |
| Carlow to Moncao | 746.72 mi (1,201.73 km) |
| Carlow to Montalegre | 761.60 mi (1,225.67 km) |
