| Hartford to Mangualde | 3,292.98 mi (5,299.55 km) |
| Hartford to Marco de Canavezes | 3,258.34 mi (5,243.79 km) |
| Hartford to Marinha Grande | 3,260.58 mi (5,247.40 km) |
| Hartford to Massama | 3,272.53 mi (5,266.63 km) |
| Hartford to Matosinhos | 3,232.05 mi (5,201.49 km) |
| Hartford to Mealhada | 3,266.08 mi (5,256.25 km) |
| Hartford to Melgaco | 3,227.71 mi (5,194.50 km) |
| Hartford to Melres | 3,249.58 mi (5,229.69 km) |
| Hartford to Mira | 3,251.05 mi (5,232.06 km) |
| Hartford to Miranda do Corvo | 3,279.67 mi (5,278.11 km) |
| Hartford to Mirandela | 3,296.18 mi (5,304.69 km) |
| Hartford to Mogadouro | 3,322.46 mi (5,346.99 km) |
| Hartford to Moimenta da Beira | 3,289.57 mi (5,294.05 km) |
| Hartford to Moita | 3,289.89 mi (5,294.57 km) |
| Hartford to Moncao | 3,218.75 mi (5,180.07 km) |
